WorksheetsReview- Chemistry Final S1 24-25
Total questions: 260
Worksheet time: 5hrs 3mins
Round 1009 to one sig figs
Round 0.010229 to three sig figs
0.0102
What is 98.907 rounded to 2 significant figure?
98
99
Calculate 5.5 cm + 5.500 cm and give your answer with the appropriate number of significant figures.
Calculate 7.987 m - 0.540 m and give your answer with the appropriate number of significant figures.
When performing the calculation 34.530 g + 12.10 g + 1222.34 g the final answer must have
How many significant figures are in the number? 4.06 x 10-5 m
3
7
5
unknown
What is the measurement of the liquid in the graduated cylinder?
65 mL
6.60 mL
6.7 mL
6.6 mL
What is the minor scale on this graduated cylinder?
Steve used a ruler to measure the length of a cube. He found the cube to be 3 cm. This is an example of a ______ observation.
Quantitative
Qualitative
Neither qualitative nor quantitative
A gray elephant stampeding across the Savannah is an example of a ______ observation.
Quantitative
Qualitative
Neither quantitative nor qualitative
It is a measure of how closely measurements align with each other when they are made in the same way.
Accuracy
Precision
Error
Extrapolation
What is the term for how close a measurement is to the accepted value?
Accuracy
Precision
Significant
Estimate
This bullseye demonstrates...
High Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & High Precision
Low Accuracy & Low Precision
Which of the following is the best scenario?
High Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & High Precision
Low Accuracy & Low Precision
What is the volume?
48 mL
48.2 mL
48.25 mL
4 mL
A controlled experiment:
Introduces bias
Tests several variables at once
Tests one variable and has limited bias
Changes no variables
What are the units of measurement for mass?
Liters
Meters
Grams
Yards
Which diagram shows the MOST dense object?
left
center
right
A block of aluminum occupies a volume of 15.0 mL and weighs 45.0 g. What is its density?
3 g/mL
0.3333 g/mL
675 g/mL
I have no idea
Using the equation ρ=Vm work out the density of this object.
2.7 m3kg
7.2 m3kg
0.72 m3kg
0.27 m3kg
What is the density of the sphere, if its mass is 50 g?
mL40 gr
g65mL
mL2 g
mL25g
Which liquid is the most dense?
oil
water
syrup
An archaeologist estimated that a fossil was 520 years old. It was actually 500. years old. What was the percent error?
Find the percent error. Round to the nearest tenth of a percent.
Actual speed: 38 mph
Estimated speed: 35 mph
8.1%
0.79%
7.9%
6.8%
7,000 g = ____ kg
70
700
7
0.07
648 g = ____ mg
6,480
64,800
648,000
64.8
240 cm = ___________ m
2400
24
2.4
0.24
1000 grams = _____ kilograms
0.0001
1,000,000
10
1
1 L = _______ mL
1
10
100
1000
Which of the following conversion factors would be used to figure out how many mililiters(mL) there are in 1280 microliters( μ L)?
11280μL× =
1mL1000μL
1000mL1μL
1000μL1mL
1mL1000uL
Which of the following conversion factors would be used to figure out how many microliters( μ L) there are in the given amount of (mL)?
18.2mL× =
1mL1000μL
1000mL1μL
1000μL1mL
1mL1000uL
Use the following dimensional analysis setup to determine the number inches in the given number of kilometers: 13.83km×1km1000m×1m100cm×2.54cm1in=
150787 in
150800 in
151000 in
150000 in
The starting chemical in a reaction is called a ________.
products
initializer
compounds
reactants
The products are generally found ____________ the arrow in a chemical reaciton.
left of
right of
above
below
What is the scientific name for when a substance ‘disappears’ into water?
combustion
double displacement
dissolving
synthesis
The scientific theory that matter is neither created nor destroyed in regular chemical reactions is called the _______________.
conservation of mass
kinetic molecular theory
conservation of energy
theory of relativity
Which best describes the meaning of the arrow between the HCl and FeCl3?
produces
combusts
dissolves
reacts with
Which best describes the meaning of the '+' between the Fe and HCl?
produces
combusts
dissolves
reacts with
What state of matter does this best model?
solid
liquid
gas
aqueous
plasma
What state of matter does this best model?
solid
liquid
gas
aqueous
plasma
What state of matter does this best model?
solid
liquid
gas
aqueous
plasma
Heat energy is also called
Nuclear Energy
Radiant Energy
Mechanical Energy
Thermal Energy
Chemical Energy
At what temperature in degrees Celsius does water freeze?
150
0
200
32
When ice sits out on a counter and melts, it is because the ice has...
gained mass
gained energy
lost mass
lost energy
When water sits in the freezer and freezes into ice, it is because the water has...
gained mass
gained energy
lost mass
lost energy
The transfer of thermal energy from a warmer object to a cooler one is...
Heat
Volume
Thermal Energy
Temperature
Why can people on one side of a room smell the scent of an air freshener sprayed on the opposite side of the room?
The molecules of air freshener have thermally expanded
The air pressure where the freshener was sprayed is greater than in the rest of the room
The molecules of air freshener spread out until they are evenly distributed throughout the room
The molecules of air freshener are amorphous
The state of matter depends on its
volume
temperature
weight
mass
What is matter?
Anything that takes up space and has mass
A substance with fixed composition
Two or more substances physically combined
A mixture with variable composition
What is an element?
A substance with fixed composition
Two or more elements chemically combined
The simplest form of matter from which more complex substances are made
A mixture with variable composition
What is a compound?
A substance with fixed composition
Two or more elements chemically combined
The simplest form of matter from which more complex substances are made
A mixture with variable composition
What is a homogeneous mixture?
A mixture where components are evenly distributed
A mixture where substances are not evenly spread out
A mixture where small particles remain dispersed throughout
A mixture where larger particles settle out over time
What is a heterogeneous mixture?
A mixture where components are evenly distributed
A mixture where substances are not evenly spread out
A mixture where small particles remain dispersed throughout
A mixture where larger particles settle out over time
Which of the following is an example of a compound?
Oxygen
Gold
Water
Helium
What is a chemical change?
A change in the composition and properties of a substance
A change in the physical appearance of a substance
A change in the state of matter of a substance
A change in the temperature of a substance
Which of the following is an example of a chemical change?
A nail rusting
Ice melting
Wood burning
A banana ripening
What evidence do we have for chemical rearrangements at the atomic level?
Observation of mass conservation
Observation of color change
Observation of temperature change
Observation of gas bubbles
a characteristic of matter you observe as it reacts or changes into a different substance
physical property
chemical property
periodic table
conglomerate
the mass per unit volume of a substance
mass
weight
volume
density
the ability of one material to dissolve in another
solubility
boiling point
melting point
state of matter
the state of being solid, liquid, or gas
solubility
boiling point
melting point
state of matter
An element is a ___ that cannot be separated into simpler substances by physical or chemical means.
pure substance
mixture
solution
compound
Which of the diagrams below represent a mixture?
A
B
C
D
Used the word "atomos" to decsribe the uncuttable (indivisible) atom.
Democritus
Thomson
Bohr
Dalton
Proposed that electrons move around the nucleus in specific layers, or shells.
Bohr
Rutherford
Chadwick
Thomson
Which of the following is/are conclusions based on Rutherford’s gold foil experiment?
Atom is mostly empty space
The nucleus is positively charged
The atom has a small dense nucleus
All answers are correct
Which part of an atom is used to identify it?
number of protons
number of neutrons
number of electrons
Who came up with the first atomic theory?
Dalton
Socrates
Thomas
Rutherford
What did Rutherford discover about atoms?
An atom is always negatively charged.
An atom is mostly empty space, but has a dense positively charged center(nucleus).
An atom is always positively charged.
All particles will pass straight through gold foil with no change in path.
What is the mass of a proton?
1840 amus
1 amu
1/1840 amus
It has no mass.
What is a negatively charged particle?
neutron
electron
proton
atom
What two particles would you find in the nucleus of an atom?
Protons and electrons
Neutrons and electrons
Protons and neutrons
Electrons and negatrons
Which scientist discovered the electrons?
Dalton
Thomson
Atristotle
Bohr
What changes in an ion?
Nucleus
Neutrons
Protons
Electrons
What changes in an isotope?
Nucleus
Protons
Nuetrons
Electrons
A Bromine ion gains 1 electron, which of the following is the correct symbol for a Bromine ion?
Br-1
Br+1
Br+7
Br-7
An atom with 2 protons, 3 neutrons, and 4 electrons has a charge of ____.
+2
-2
+3
0
Which one of these is not a noble gas?
He
Rn
I
Kr
What family is Sodium (Na) a part of?
noble gases
Halogens
Alkali Metals
What is electronegativity?
The ability of an atom to attract and bind with electrons
The energy needed for a neutral atom to remove an electron
The ability of an atom to become a negative ion
The size of an atom
Which element has the least electronegativity?
Francium
Cesium
Fluorine
Helium
What is ionization energy?
The ability of an atom to attract and bind with electrons
The energy needed for a neutral atom to remove an electron
The ability of an atom to become a negative ion
The size of an atom
Which element has the highest ionization energy?
Francium
Cesium
Fluorine
Helium
What is atomic radius?
The ability of an atom to attract and bind with electrons
The energy needed for a neutral atom to remove an electron
The ability of an atom to become a negative ion
The size of an atom
Which element has the highest atomic radius?
Francium
Cesium
Fluorine
Helium
Which element has the lowest ionization energy?
Francium
Cesium
Fluorine
Helium
What is the trend of ionization energy down a group in the periodic table?
Increases
Decreases
Remains constant
First increases, then decreases
What is the amount of energy required to remove an electron from an atom?
atomic energy
ionization energy
ionic energy
electron energy
What idea is this cartoon showing?
chlorine is more electronegative than hydrogen
chlorine has more energy levels than hydrogen
hydrogen is more electronegative than chlorine
Label the two parts of the atom here.
Match the following mass amounts with the proper charge.
Protons
(+)positive
Electron
(-) negative
Neutron
(0) neutral, no charge
What is Neils Bohr's contribution to the atomic theory?
Created the atomic theory
Created a model of the atom with electrons moving around the nucleus in a fixed orbits
Discovered that the proton had a positive charge
Believed that atoms of a given element are identical
Discovered the electron
Mass is neither created nor destroyed during chemical reactions or physical changes.
Law of multiple proportions
law of definite proportions
law of scientific theory
law of conservation of mass
How many electrons can the 1st level hold?
(a)
How many electrons can the 3rd level hold?
(a)
How many electrons can the 2nd level hold?
(a)
How many valence electrons does the element sodium (Na) have?
(a)
How many electrons can a d sublevel hold?
14
10
2
6
How many orbitals does an s sublevel have?
1
3
5
7
How many orbitals does a d sublevel have?
1
3
5
7
Electrons fill energy levels and sublevels _____ in energy first.
lower
higher
Of the following sublevels, which is the highest in energy?
4s
3d
4p
5s
Which energy level has the lowest energy and is closest to the nucleus?
1
2
3
4
5
An orbital can hold a maximum of 2 electrons.
True
False
When electrons are closer to their own nucleus.....
they are more attracted to its positive charge.
they are less attracted to its positive charge.
Where are the valence electrons
nowhere
anywhere
the outermost
innermost
What is the purpose of an electron configuration?
To indicate the arrangement of protons in an element
To indicate the arrangement of electrons in an element
To indicate the arrangement of neutrons in an element
To indicate the arrangement of atoms in a compound
According to Hund's Rule, how are electrons distributed in a sublevel with more than one orbital?
One electron per orbital before pairing
Two electrons per orbital after pairing
One electron per orbital after pairing
Two electrons per orbital before pairing
What is the electron configuration of Nitrogen?
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2
1s2 2s2 2p6
1s2 2s2 2p3
What is the electron configuration of Cobalt?
1s2 2s2 2p6 3s2 3p6 4s2 3d7
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
1s2 2s2 2p6 3s2 3p6 4s2 3d10
Which example shows a violation of Hund's Rule?
A
B
C
D
Which of the following is written correctly?
A
B
C
D
This orbital diagram represents
Nitrogen
Oxygen
Carbon
Neon
Choose the correct electron configuration for Nickel (Ni).
1s2 2s2 2p6 3s2 3p6 4s2 3d8
1s2 2s2 2p6 3s2 3p6 4s2 3d2
1s2 2s2 2p6 3s2 3p6 4s10
Choose the correct electron configuration for Krypton (Kr).
1s2 2s2 2p6 3s2 3p6 4s8 3d10
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
Each row on the periodic table represents:
an energy level
a sublevel
an electron
an orbital
What is the electron configuration of Rb+1?
1s² 2s² 2p6 3s² 3p6 4s² 3d¹⁰ 4p7
1s² 2s² 2p6 3s² 3p6 4s² 3d¹⁰ 4p8
1s² 2s² 2p6 3s² 3p6 4s² 3d¹⁰ 4p5
1s² 2s² 2p6 3s² 3p6 4s² 3d¹⁰ 4p6
How many valence electrons does Cobalt have?
1
2
3
4
What is the noble gas configuration for beryllium (Be)?
[He]1s2
[He]2s2
[Li]2s1
[Li]2s2
What is the noble gas configuration for boron (B)?
[He]1s22s2
[He]2s22p2
[He]2s22p1
[Li]2s22p1
[Xe] 6s2 4f14 5d9
What are 2 ways of writing the configuration for Aluminum?
With what neutral element is Ag+ isoelectronic?
Cd
Pd
Xe
Kr
What is meant by isolectronic?
Group of atoms or ions have the same electronic configuration
Group of atoms or ions have the same protonic configuration
Group of atoms or ions have the same electrical properties
Group of atoms or ions have the same electron charge
What is the example of species that are isolectronic?
Na+ and Si4+
Na+ and Cl-
Mg2+ and Al +
S2- and O2-
Identify the following compound as ionic or covalent: Ca(OH)2
ionic
covalent
Identify the following compound as ionic or covalent: SO2
ionic
covalent
What type of bond involves the sharing of electrons between atoms?
covalent bond
ionic bond
metallic bond
transfer bond
Which is the correct molecular structure for carbon dioxide CO2?
H2O has how many covalent bonds?
0
1
2
3
N2 is an example of a
Single Bond
Double Bond
Triple Bond
Which Lewis Dot Model drawing correctly shows an O2 molecule?
How many total valence electrons are participating in bonding in the molecule above?
8
4
2
3
What is the correct Lewis Dot Structure for ammonia NH3
Which best describes a triple bond?
3 shared pairs of electrons
3 shared electrons
a central electron with 3 atoms bonded around it
The word "molecule" applies to substances made of
ionic bonds
covalent bonds
metallic bonds
2 or more different atoms
Which of the following is the best representation of a molecule of fluorine (F2)?
A
B
C
D
What shape would PH3 have?
Trigonal Planar
Trigonal pyramidal
Bent
Linear
Which of these is the shape of CCl4?
What is the molecular geometry/shape of a molecule with 2 shared pairs and 2 unshared pairs?
Linear
Bent
Trigonal Pyramidal
Tetrahedral
What type of bond would form between O and H?
Polar Covalent
Non-Polar Covalent
Ionic
What type of bond would form between O and O?
Polar Covalent
Non-Polar Covalent
Ionic
What type of bond would form between Li and O?
Polar Covalent
Non-Polar Covalent
Ionic
The bond between C and Cl is polar covalent. That means
there is a pair of electrons shared equally between them
there is a pair of electrons shared unequally between them
an electron will be stolen from one and given to the other
What type of bond contains atoms with "partial" charges?
Polar Covalent
Non-Polar Covalent
Ionic
Classify the following molecule.
polar
nonpolar
Classify the following molecule as polar or nonpolar: HCl
Polar
Nonpolar
Classify the following molecule as polar or nonpolar: F2
Polar
Nonpolar
Electronegativity is a measurement of the ability of a nucleus to:
attract bonding electrons
attract other nuclei
attract electrons in the non-valence energy levels
Classify the following molecule as polar or nonpolar: NCl3
polar
nonpolar
Classify the following molecule.
polar
nonpolar
The electrons in a nonpolar covalent molecule are shared...
Evenly
Unevenly
Electrons are not shared
None of the Above
Li+
Name this ion: NH4+
ammonia
ammonium
nitrate
nitride
Which is NOT a polyatomic ion?
OH-
Cl-
HCO3-
NH4+
Name that ion... Cu2+
copper(II) ion
copper (III) ion
copper ion
coppride ion
Which of the following is the proper formula for Chlorite?
ClO-
ClO2-
ClO3-
ClO4-
PO43-
phosphorus oxygen ion
phosphorus ion
phosphate ion
phosporic ion
If the negative ion ends with -ate/ -ite that is means that ion is a polyatomic ion.
TRUE
FALSE
Metal ions have a _______________ charge.
positive
negative
neutral
All the Group 1A ions have a __________ charge. (Li, Na, K, Rb, Cs)
1+
2+
3+
1-
Monatomic ions, consist of a ............... atom
More than two
two
single
What is the name of the following compound: Mn2O3
manganese oxide
manganese(II) oxide
manganese(III) oxide
magnesium oxide
What is the charge of copper in the compound: CuBr2
+1
+2
-1
-2
What is the what charge of lead in the compound: lead(IV) iodide
+1
+4
+6
-1
Which is the correct formula for the compound: Calcium Oxide
CaO
CaO2
Ca2O
When naming acids without oxygen, the ending always changes to:
-ate
-ite
-ic
-ous
Acids without oxygen start with the prefix "____________"
acid
nitric
hydraulic
hydro
What is the name of HBr?
bromic acid
hydrobromic acid
hydroxybromic acid
hydroic acid
What is the name of H3PO4?
hydrophosphoric acid
phosphorous acid
phosphorhydroic acid
phosphoric acid
What is the correct name of HClO3?
hydrochloric acid
chloric acid
chlorous acid
hydrochlorous acid
What is the formula for nitric acid?
HNO3
HNO2
HNO
H3NO
What is the formula for chlorous acid?
HClO3
HClO2
H2ClO2
HCl
Always add the word "________" to the end when naming acids
base
hydro
acid
Baumstark
When the polyatomic ion in an acid ends in -ate, the root name of the polyatomic ion is followed by the ending -_____.
ide
ic
ous
ite
When naming oxyacids, change "-ite" to:
-ate
-ic
-ous
-ite
