Font size
WorksheetsMidterm Exam Study Guide - HISD CHEM & Pre-AP Chem
Total questions: 75
Worksheet time: 38mins
What is the single determining factor that can always be used to identify an element? However, what part of an atom is involved directly in bonding with other elements?
The number of protons; electrons
The number of neutrons; protons
The atomic mass; neutrons
The number of electrons; neutrons
For the following atoms, fill in the chart. Atom: Oxygen
Atomic Number: 8, # of protons: 8, # of electrons: 8, # of neutrons: 8, Non-metal, Number of valence electrons: 6
Atomic Number: 6, # of protons: 6, # of electrons: 6, # of neutrons: 6, Non-metal, Number of valence electrons: 4
Atomic Number: 8, # of protons: 8, # of electrons: 8, # of neutrons: 10, Metal, Number of valence electrons: 2
Atomic Number: 7, # of protons: 7, # of electrons: 7, # of neutrons: 7, Non-metal, Number of valence electrons: 5
For the following atoms, fill in the chart. Atom: Beryllium Fill in: Atomic Number, # of protons, # of electrons, # of neutrons, Metal, non-metal, or metalloid?, Number of valence electrons.
Atomic Number: 4, # of protons: 4, # of electrons: 4, # of neutrons: 5, Metal, Number of valence electrons: 2
Atomic Number: 5, # of protons: 5, # of electrons: 4, # of neutrons: 4, Metalloid, Number of valence electrons: 3
Atomic Number: 4, # of protons: 4, # of electrons: 5, # of neutrons: 4, Non-metal, Number of valence electrons: 4
Atomic Number: 3, # of protons: 3, # of electrons: 3, # of neutrons: 4, Metal, Number of valence electrons: 1
For the following atoms, fill in the chart. Atom: Atomic Number 79 Fill in: Atom name, # of protons, # of electrons, # of neutrons, Metal, non-metal, or metalloid?, Number of valence electrons.
Atom: Gold, # of protons: 79, # of electrons: 79, # of neutrons: 118, Metal, Number of valence electrons: 1
Atom: Silver, # of protons: 47, # of electrons: 47, # of neutrons: 61, Metal, Number of valence electrons: 1
Atom: Platinum, # of protons: 78, # of electrons: 78, # of neutrons: 117, Metal, Number of valence electrons: 2
Atom: Mercury, # of protons: 80, # of electrons: 80, # of neutrons: 120, Metal, Number of valence electrons: 2
For the following atoms, fill in the chart. Atom: Silicon
Atomic Number: 14, # of protons: 14, # of electrons: 14, # of neutrons: 14, Metalloid, Number of valence electrons: 4
Atomic Number: 12, # of protons: 12, # of electrons: 12, # of neutrons: 14, Metal, Number of valence electrons: 2
Atomic Number: 16, # of protons: 16, # of electrons: 16, # of neutrons: 16, Nonmetal, Number of valence electrons: 6
Atomic Number: 14, # of protons: 14, # of electrons: 13, # of neutrons: 14, Metalloid, Number of valence electrons: 3
For the following atoms, fill in the chart. Atom: Atomic Number 55 Fill in: Atom name, # of protons, # of electrons, # of neutrons, Metal, non-metal, or metalloid?, Number of valence electrons.
Atom: Cesium, # of protons: 55, # of electrons: 55, # of neutrons: 78, Metal, Number of valence electrons: 1
Atom: Barium, # of protons: 56, # of electrons: 56, # of neutrons: 81, Metal, Number of valence electrons: 2
Atom: Rubidium, # of protons: 37, # of electrons: 37, # of neutrons: 48, Metal, Number of valence electrons: 1
Atom: Cesium, # of protons: 55, # of electrons: 54, # of neutrons: 78, Metalloid, Number of valence electrons: 2
For the following atoms, fill in the chart. Atom: Fluorine
Atomic Number: 9, # of protons: 9, # of electrons: 9, # of neutrons: 10, Non-metal, Number of valence electrons: 7
Atomic Number: 8, # of protons: 8, # of electrons: 8, # of neutrons: 9, Non-metal, Number of valence electrons: 6
Atomic Number: 10, # of protons: 10, # of electrons: 10, # of neutrons: 11, Non-metal, Number of valence electrons: 8
Atomic Number: 9, # of protons: 9, # of electrons: 8, # of neutrons: 10, Non-metal, Number of valence electrons: 6
For the trend 'Atomic Radius', fill in the chart: Increase or Decrease Down Group, Increase or Decrease L to R Across Period, Does the trend include Noble Gases? Why?
Increase down group, decrease left to right across period, does not include noble gases because they already have a full valence shell.
Decrease down group, increase left to right across period, includes noble gases because they have incomplete valence shells.
Increase down group, increase left to right across period, does not include noble gases because they are metals.
Decrease down group, decrease left to right across period, includes noble gases because they are nonmetals.
For the trend 'Electronegativity', fill in the chart: Increase or Decrease Down Group, Increase or Decrease L to R Across Period, Does the trend include Noble Gases? Why?
Decrease down group, increase left to right across period, does not include noble gases because they already have an octet.
Increase down group, decrease left to right across period, includes noble gases because they are highly reactive.
Decrease down group, decrease left to right across period, includes noble gases because they have low electronegativity.
Increase down group, increase left to right across period, does not include noble gases because they are metals.
For the trend 'Ionization energy', fill in the chart: Increase or Decrease Down Group, Increase or Decrease L to R Across Period, Does the trend include Noble Gases? Why?
Decrease down group, increase left to right across period, does not include noble gases because they already have a full valence shell.
Increase down group, decrease left to right across period, includes noble gases because they have low ionization energy.
Decrease down group, decrease left to right across period, includes noble gases because they lose electrons easily.
Increase down group, increase left to right across period, does not include noble gases because they have incomplete valence shells.
For the trend 'Groups & Periods', fill in the chart: Increase or Decrease Down Group, Increase or Decrease L to R Across Period, Does the trend include Noble Gases? Why?
Groups are columns, periods are rows; noble gases are included as Group 18.
Groups are rows, periods are columns; noble gases are not included in any group.
Groups are diagonal, periods are vertical; noble gases are included as Group 1.
Groups are columns, periods are rows; noble gases are excluded because they are not reactive.
Which is the element with the highest attraction for electrons: N, O, F, I?
N
O
F
I
Which is the element with the greatest electronegativity?
O
Fe
K
N
Which is the element with the largest atomic radius?
Ca
Mg
Be
B
Circle the element with the largest atomic radius:
Ne
Cl
P
S
Order the following based on increasing electronegativity: Cl, Ar, Al, Mg
Ar, Mg, Al, Cl
Mg, Al, Ar, Cl
Al, Mg, Cl, Ar
Mg, Ar, Al, Cl
Order the following based on increasing atomic radii: Ti, Hf, Zr
Ti, Zr, Hf
Ti, Hf, Zr
Zr, Ti, Hf
Hf, Ti, Zr
Which of the pairs are located in the same period?
Ca, Sr
Nb, Mo
Na, K
B, Si
Valence electrons are located:
in the outermost shell of an atom
in the nucleus of an atom
in the innermost shell of an atom
between atomic shells
Fill in the following table with the appropriate missing information for Neon:
Neon: 10 protons, 10 neutrons, 10 total electrons, 8 valence electrons, Lewis dot structure: Ne with 8 dots.
Neon: 10 protons, 12 neutrons, 10 total electrons, 6 valence electrons, Lewis dot structure: Ne with 6 dots.
Neon: 8 protons, 10 neutrons, 10 total electrons, 8 valence electrons, Lewis dot structure: Ne with 8 dots.
Neon: 10 protons, 10 neutrons, 8 total electrons, 8 valence electrons, Lewis dot structure: Ne with 8 dots.
Fill in the following table with the appropriate missing information for Nitrogen:
Nitrogen: 7 protons, 7 neutrons, 7 total electrons, 5 valence electrons, Lewis dot structure: N with 5 dots.
Nitrogen: 8 protons, 7 neutrons, 7 total electrons, 6 valence electrons, Lewis dot structure: N with 6 dots.
Nitrogen: 7 protons, 8 neutrons, 8 total electrons, 4 valence electrons, Lewis dot structure: N with 4 dots.
Nitrogen: 6 protons, 7 neutrons, 7 total electrons, 5 valence electrons, Lewis dot structure: N with 5 dots.
Fill in the following table with the appropriate missing information for Bromine:
Bromine: 35 protons, 45 neutrons, 35 total electrons, 7 valence electrons, Lewis dot structure: Br with 7 dots.
Bromine: 34 protons, 45 neutrons, 35 total electrons, 6 valence electrons, Lewis dot structure: Br with 6 dots.
Bromine: 35 protons, 44 neutrons, 36 total electrons, 8 valence electrons, Lewis dot structure: Br with 8 dots.
Bromine: 36 protons, 45 neutrons, 34 total electrons, 7 valence electrons, Lewis dot structure: Br with 7 dots.
Fill in the following table with the appropriate missing information for Aluminum: Number of protons, Number of neutrons, Number of total electrons, Number of valence electrons, Lewis electron dot structure.
Aluminum: 13 protons, 14 neutrons, 13 total electrons, 3 valence electrons, Lewis dot structure: Al with 3 dots.
Aluminum: 12 protons, 13 neutrons, 12 total electrons, 2 valence electrons, Lewis dot structure: Al with 2 dots.
Aluminum: 14 protons, 15 neutrons, 14 total electrons, 4 valence electrons, Lewis dot structure: Al with 4 dots.
Aluminum: 13 protons, 13 neutrons, 13 total electrons, 2 valence electrons, Lewis dot structure: Al with 2 dots.
When drawing Lewis Dot structures of bonds, nonmetals must achieve an ________ which means it has 8 valence electrons.
octet
duet
sextet
quartet
Select the correct Lewis Dot structure for AlN (Ionic Bond - electrons are transferred).
Al loses 3 electrons to N, forming Al3+ and N3− with full octets.
Al shares electrons with N, forming a covalent bond.
Al gains 3 electrons from N, forming Al3− and N3+.
Al and N do not transfer electrons and remain neutral atoms.
Draw the Lewis Dot structure for H2O. Identify its molecular shape and whether it is polar or nonpolar.
Bent shape; polar molecule
Linear shape; nonpolar molecule
Trigonal planar shape; polar molecule
Tetrahedral shape; nonpolar molecule
Draw the Lewis Dot structure for CCl4. Identify its molecular shape and whether it is polar or nonpolar.
CCl4 has a tetrahedral shape and is nonpolar.
CCl4 has a linear shape and is polar.
CCl4 has a trigonal planar shape and is polar.
CCl4 has a bent shape and is nonpolar.
Draw the Lewis Dot structure for N2. Identify its molecular shape and whether it is polar or nonpolar.
N2 has a linear shape and is nonpolar.
N2 has a bent shape and is polar.
N2 has a trigonal planar shape and is nonpolar.
N2 has a tetrahedral shape and is polar.
Classify the following compound as ionic: MgSO4
Ionic
Covalent
Metallic
Molecular
Classify the following compound as ionic: CO2
Not ionic (covalent)
Ionic
Metallic
Acidic
Classify the following compound as ionic: NaCl
Ionic
Covalent
Metallic
Molecular
Classify the following compound as ionic: Iron (II) oxide
Ionic
Covalent
Metallic
Molecular
Classify the following compound as ionic: CuCl2
Ionic
Covalent
Metallic
Molecular
Classify the following compound as ionic: SCl5
Not ionic (covalent)
Ionic
Metallic
Acidic
Classify the following compound as ionic: C3H8
Not ionic (covalent)
Ionic
Metallic
Acidic
Fill in the following table to describe the electron configuration and number of electrons in each orbital for Br (Bromine).
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5; Electron config. - noble gas method (short way): [Ar]4s2 3d10 4p5; Total # of electrons: 35
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6; Electron config. - noble gas method (short way): [Ar]4s2 3d10 4p6; Total # of electrons: 36
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4; Electron config. - noble gas method (short way): [Ar]4s2 3d10 4p4; Total # of electrons: 34
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3; Electron config. - noble gas method (short way): [Ar]4s2 3d10 4p3; Total # of electrons: 32
Fill in the following table to describe the electron configuration and number of electrons in each orbital for Ag (Silver).
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10; Electron config. - noble gas method (short way): [Kr] 5s1 4d10; Total # of electrons: 47
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9; Electron config. - noble gas method (short way): [Kr] 5s2 4d9; Total # of electrons: 47
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10; Electron config. - noble gas method (short way): [Kr] 5s2 4d10; Total # of electrons: 48
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d9; Electron config. - noble gas method (short way): [Kr] 5s1 4d9; Total # of electrons: 46
Fill in the following table to describe the electron configuration and number of electrons in each orbital for Ca+2 (Calcium ion).
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6; Electron config. - noble gas method (short way): [Ar]; Total # of electrons: 18
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s2; Electron config. - noble gas method (short way): [Ar] 4s2; Total # of electrons: 20
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p6 4s1; Electron config. - noble gas method (short way): [Ar] 4s1; Total # of electrons: 19
Electron Configuration- Long way: 1s2 2s2 2p6 3s2 3p5; Electron config. - noble gas method (short way): [Ar] 3p5; Total # of electrons: 17
How many electrons are located in all p orbitals in a sulfur atom?
4
6
10
12
How many electrons are located in s orbitals in the quantum mechanical model of chlorine?
10
8
12
6
Draw orbital diagrams for the following elements: Phosphorous, Nickel, Bromine, Argon.
Phosphorous: 1s2 2s2 2p6 3s2 3p3; Nickel: 1s2 2s2 2p6 3s2 3p6 4s2 3d8; Bromine: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5; Argon: 1s2 2s2 2p6 3s2 3p6
Phosphorous: 1s2 2s2 2p6 3s2 3p5; Nickel: 1s2 2s2 2p6 3s2 3p6 4s2 3d10; Bromine: 1s2 2s2 2p6 3s2 3p6 4s2 3d8 4p5; Argon: 1s2 2s2 2p6 3s2 3p4
Phosphorous: 1s2 2s2 2p6 3s2 3p2; Nickel: 1s2 2s2 2p6 3s2 3p6 4s2 3d6; Bromine: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3; Argon: 1s2 2s2 2p6 3s2 3p5
Phosphorous: 1s2 2s2 2p6 3s2 3p4; Nickel: 1s2 2s2 2p6 3s2 3p6 4s2 3d7; Bromine: 1s2 2s2 2p6 3s2 3p6 4s2 3d9 4p5; Argon: 1s2 2s2 2p6 3s2 3p7
Convert the following number to scientific notation: 45,000
4.5 x 10^4
45 x 10^3
0.45 x 10^5
4.5 x 10^3
Convert the following number: 430,000 to scientific notation.
4.3x105
4.3 x 10^4
43 x 10^4
430 x 10^3
Convert the following number to scientific notation:
702,000,000
7.02 x 10^8
7.02x107
7.02 x 10^6
7.02 x 10^9
Convert the following number: 0.002 to scientific notation.
2x10−3
2x103
0.2x10−2
2x10−2
Convert the following number: 0.000036 to scientific notation.
3.6 x 10^{-5}
3.6 x 10^5
3.6 x 10^{-4}
36 x 10^{-6}
Convert the following number: 190 to scientific notation.
1.9 x 10^2
19 x 10^1
0.19 x 10^3
1.90 x 10^1
Convert the following number: 0.670 to scientific notation.
6.7x10−1
0.67 x 10^1
67 x 10^{-3}
6.70 x 10^0
For the observation 'Burning wood', is it a Chemical or Physical change?
Chemical change
Physical change
Phase change
Mixture formation
For the observation 'Rotting Banana', is it a Chemical or Physical change?
Chemical change
Physical change
No change
Temporary change
For the observation 'Ice melting', is it a Chemical or Physical change?
Physical change
Chemical change
Nuclear change
Biological change
For the observation 'Iron rusting', is it a Chemical or Physical change?
Chemical change
Physical change
Reversible change
Temporary change
For the observation 'Combining salt and pepper', is it a Chemical or Physical change?
Physical change
Chemical change
Evaporation
Fermentation
For the observation 'Putting a gold coating on a metal', is it a Chemical or Physical change?
Physical change
Chemical change
Nuclear change
Biological change
What is the name of the covalent compound with the formula C2O5?
Dicarbon pentoxide
Dicarbon dioxide
Carbon dioxide
Dinitrogen pentoxide
What is the formula for the ionic compound Sodium Sulfide?
Na2S
NaS2
NaSO4
Na2SO3
What is the name of the covalent compound with the formula CO2?
Carbon dioxide
Carbon monoxide
Carbon trioxide
Carbon tetrachloride
Carbonic acid
What is the formula for the ionic compound Copper(II) chloride?
CuCl2
CuCl
Cu2Cl
Cu2Cl2
What is the name of the covalent compound with the formula F3P3?
Trifluorine triphosphide
Trifluorophosphine
Phosphorus trifluoride
Phosphine trifluoride
What is the formula for the ionic compound Magnesium sulfate?
MgSO4
MgSO3
Mg2SO4
MgS
What is the name of the covalent compound with the formula S2Br5?
Disulfur pentabromide
Sulfur dibromide
Disulfur bromide
Sulfur pentabromide
What is the formula for the ionic compound Lithium sulfide?
Li2S
LiS
Li2SO4
LiS2
What is the name of the covalent compound with the formula NO?
Nitric oxide
Nitrous oxide
Nitrogen dioxide
Nitrogen monoxide
What is the formula for the ionic compound Aluminum bromide?
AlBr3
AlBr2
Al2Br3
Al3Br
What is the name of the covalent compound with the formula Decacarbon hexafluoride?
C10F6
C6F10
C10F10
C6F6
What is the formula for the ionic compound Sodium phosphate?
Na3PO4
Na2PO4
NaPO4
Na3P
The Law of Conservation of Mass states that:
Mass cannot be created or destroyed in a chemical reaction.
Mass can be created during a chemical reaction.
Mass is always lost in a chemical reaction.
Mass is only conserved in physical changes.
A barista places a coffee cup on a scale. They add 4 tablespoons of sugar to the coffee. The sugar dissolves and therefore, volume stays the same. What happens to the mass?
The mass increases.
The mass decreases.
The mass stays the same.
The mass becomes zero.
Part IX: Atomic Theory Timeline Re-watch the YouTube video, “TedED Atomic theory timeline” and be sure you are familiar with each scientist, what their discovery was, and what experiment they did to find that discovery. Ex/ Rutherford shot alpha particles at a sheet of gold foil and noticed that some passed through, but some bounced back. The particles that bounced back were hitting the nucleus (where majority of the mass is) & the particles passed through the mostly empty space electron-orbitals. Dalton: ____________________________
Proposed that matter is made of indivisible atoms.
Discovered the electron using cathode ray tubes.
Developed the planetary model of the atom.
Identified the neutron in the nucleus.
Part IX: Atomic Theory Timeline Re-watch the YouTube video, “TedED Atomic theory timeline” and be sure you are familiar with each scientist, what their discovery was, and what experiment they did to find that discovery. Ex/ Rutherford shot alpha particles at a sheet of gold foil and noticed that some passed through, but some bounced back. The particles that bounced back were hitting the nucleus (where majority of the mass is) & the particles passed through the mostly empty space electron-orbitals. Thomson: ____________________________
Thomson: Discovered the electron using the cathode ray tube experiment.
Thomson: Discovered the neutron using the oil drop experiment.
Thomson: Proposed the planetary model of the atom after the gold foil experiment.
Thomson: Discovered the proton using the hydrogen discharge tube.
Part IX: Atomic Theory Timeline Re-watch the YouTube video, “TedED Atomic theory timeline” and be sure you are familiar with each scientist, what their discovery was, and what experiment they did to find that discovery. Ex/ Rutherford shot alpha particles at a sheet of gold foil and noticed that some passed through, but some bounced back. The particles that bounced back were hitting the nucleus (where majority of the mass is) & the particles passed through the mostly empty space electron-orbitals. Rutherford: ____________________________
Rutherford: Discovered the nucleus using the gold foil experiment.
Rutherford: Discovered the electron using the cathode ray tube experiment.
Rutherford: Proposed the plum pudding model of the atom.
Rutherford: Discovered the neutron using the beryllium experiment.
Bohr: ____________________________
Bohr: Proposed that electrons orbit the nucleus in fixed energy levels.
Bohr: Discovered the neutron in the atomic nucleus.
Bohr: Suggested atoms are indivisible and indestructible.
Bohr: Developed the plum pudding model of the atom.
Part IX: Atomic Theory Timeline
Re-watch the YouTube video, “TedED Atomic theory timeline” and be sure you are familiar with each scientist, what their discovery was, and what experiment they did to find that discovery.
Ex/ Rutherford shot alpha particles at a sheet of gold foil and noticed that some passed through, but some bounced back. The particles that bounced back were hitting the nucleus (where majority of the mass is) & the particles passed through the mostly empty space electron-orbitals.
Heisenberg: ____________________________
Developed the uncertainty principle.
Discovered the electron.
Proposed the plum pudding model.
Formulated the law of definite proportions.
Lil Wayne notices that his sandwich has accumulated mold. He remembers his friend, Drake, telling him that coconut juice can make mold go away. Lil Wayne decides to listen to him and sprays coconut juice on one side of his sandwich. He leaves the other half of the sandwich alone. After 3 days of treatment, there is no change in the appearance of the mold on either side of the sandwich.
Identify the:
Control group:
Independent Variable:
Dependent Variable:
Control group: The half of the sandwich not sprayed with coconut juice. Independent Variable: Application of coconut juice. Dependent Variable: Amount of mold on the sandwich.
Control group: The sandwich sprayed with coconut juice. Independent Variable: Type of bread used. Dependent Variable: Color of the mold.
Control group: The sandwich kept in the fridge. Independent Variable: Temperature of storage. Dependent Variable: Weight of the sandwich.
Control group: The sandwich with extra sugar. Independent Variable: Amount of sugar added. Dependent Variable: Size of the sandwich.
Rank the intermolecular forces (hydrogen bonding, London dispersion forces, and dipole-dipole) in order of increasing strength. Explain why each IMF has that specific amount of strength.
London dispersion forces < dipole-dipole < hydrogen bonding
Hydrogen bonding < dipole-dipole < London dispersion forces
Dipole-dipole < London dispersion forces < hydrogen bonding
London dispersion forces < hydrogen bonding < dipole-dipole
