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WorksheetsFall Chemistry Mega Review
Total questions: 41
Worksheet time: 21mins
For an experiment, a student needs to determine how many moles are present in 30.2 grams of Cu(OH)2.
3217.38 mol
2439.04 mol
0.30 mol
0.45 mol
Germanium has two common isotopes, 71Rb and 73Rb. If the abundance of 71Rb is 39.0% and the abundance of 73Rb is 61.0%, what is the average atomic mass of germanium?
8555.63
72.22
86.91
85.56
A sample of a particular element has a silvery-white color, conducts electricity, and has two valence electrons. This element most likely belongs to which group?
Alkali metals
Alkaline earth metals
Halogens
Noble gases
Which of these is the electron-dot diagram for Cl2?
How many neutrons are present in an atom of zinc in the picture?
34
64
92
30
What is the electron configuration of a potassium atom at ground state?
1s2 2s2 2p6 3s2 2p6 4s1
1s2 2s2 2p6 3s2 2p6 3d1
1s2 2s2 2p6 3s2 2p6 4d1
1s2 2s2 2p6 3s2 2p6 3d10 4s1
Krypton and Xenon are used in the production of certain types of lights. Which of the following best describes the elements within their chemical family
highly reactive gases
mildly reactive solids
nonreactive gases
nonreactive solids
How many atoms are present in 186 moles of iridium?
3.3 X 104 atoms
1.12 X 1026 atoms
2.82 X 10-22 atoms
1.97 X 1028 atoms
Element X has three naturally occurring isotopes. The chart contains the isotopes and their percentages. What is the average atomic mass of Element X?
6.941 amu
24.29 amu
20.192 amu
35.458 amu
Which of the following diagrams correctly represents the formation of a compound consisting of calcium and fluorine?
Which of the following shows a correct Lewis dot structure?
What is the electron configuration for an atom of arsenic?
1s22s22p63s23p64s23d104p3
1s22s22p63s23p64s24d104p2
1s22s23s23p4s23d104p2
1s22s22p63s23p64s24d104p3
The oldest chemistry teacher at Dickinson High School is 315,360 hours old. How old, in years, is the oldest chemistry teacher?
39 years old
36 years old
38 years old
37 years old
Which of the following contains only ionic bonds?
NaCl, CaO
KNO3, CCl4
SiO2, CO2
CO2, H2O
Which of the following is an acceptable structural formula for methane?
Which pair of elements and chemical formula is correct?
iron(III) and oxygen, Fe3O2
beryllium and sulfur, BeS
tin (II) and bromine, Sn2Br
aluminum and fluorine, Al3F
When you are diluting an acid, to avoid causing a severe reaction you should always add the _______ to the ______.
acid, base
water, acid
water, base
acid, water
Which of the following formulas below represents Lead (IV) and Nitrate when they form an ionic bond?
PbNO3
PbNO2
Pb(NO3)2
Pb(NO3)4
A mixture of metals is called a(n) __________.
Alloy.
Metal.
Iron.
Covalent.
Which of the following is the correct Lewis structure for Carbon Disulfide?
The molar mass of tin (II) bicarbonate, Sn(HCO3)2 is
98.09 g/mol
77.05 g/mol
278.05 g/mol
240.75 g/mol
What is the correct formula for when ammonium bonds with sulfate? (crisscross)
(NH4)2(SO4)2
(NH4)2SO4
NH4SO4
NH4(SO4)2
What is the molar mass for one atom of Nitrogen (N)?
14.01 g/mol
13 g/mol
26.98 g/mol
350.75 g/mol
An atom with the electron configuration of s2p4 in the outer shell is in the same family as
Beryllium
Carbon
sulfur
Fluorine
The oxidation number that the Alkali metals normally have when forming compounds is
+ 2
- 2
+ 1
+ 4
Which of the following substances would melt at the highest temperature
Ammonia (NH3)
Barium oxide (BaO)
Carbon monoxide (CO)
Sulfur dioxide (SO2)
What color has the lowest energy?
Blue
Red
Orange
Violet
What is the oxidation number of chlorine in AlCl3?
- 1
+ 1
- 3
+ 3
How many electrons will a aluminum atom (Al) lose in order to become stable?
four
three
two
one
All isotopes of the same element
have differing numbers of neutrons
have different atomic numbers
have different mass numbers
have different numbers of electrons
When preforming a chemical reaction...
All atoms of an element have the same mass.
A compound does not always contain the same elements in a fixed ratio by mass.
The total mass of the products of a chemical reaction is equal to the total mass of the reactants.
Mass of the reactants is lost during a combustion reaction.
The bond formed when two atoms transfer electrons is called a(n)
hydrogen bond
ionic bond
covalent bond
metallic bond
Polar molecules have
no negative or positive ends
both negative and positive ends
only a negative end
only a positive end
Unknown element X has three energy levels, five valence electrons, and is a metalloid. What is element X?
K
Cl
Ge
P
Methane, CH4 is a(n) _________ molecule.
metallic
ionic
non-polar covalent
polar covalent
The separation technique shown in the picture is used to separate substances based off of boiling point. What is the separation technique called?
Distillation
Chromatography
Magnetism
Centrifugation
Which of these is most appropriate for transferring 3 mL of a liquid?
All of the following would be appropriate safety rules in the lab except:
Conduct experiments when no one is looking
Tie back long hair or loose clothing.
Do not eat, drink, or directly inhale any unknown chemicals.
Report any injury or broken equipment to your teacher immediately.
What is the chemical formula for diphosphorus heptachloride?
P2Cl7
P5Cl
P10Cl2
PCl5
In 3p6, the 6 represents the number of ___________________.
electrons
neutrons
energy levels
sublevels
How many O2 molecules are there in a mole of oxygen?
1.20 x 1024
6.02 x 1023
6.02 x 1023
3.00 x 108
