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WorksheetsChemistry Test 3 Review
Total questions: 35
Worksheet time: 1hrs 10mins
Name
Class
Date
1.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
2.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
3.
What is this element?
1s22s22p63s2
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
4.
Which element is pictured?
a)
neon
b)
fluorine
c)
magnesium
d)
argon
5.
Which of the following is a p block element?
a)
Ca
b)
Ar
c)
Re
d)
Au
6.
How many valence electrons does Chlorine have?
a)
5
b)
2
c)
7
d)
5
7.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
8.
What percent of carbon-14 would be left after 11,460 years?
a)
100%
b)
75%
c)
50%
d)
25%
9.
Which radioactive isotope has a shorter half-life?
a)
Carbon-14
b)
Plutonium-239
c)
Same
10.
What process power existing nuclear power-plants?
a)
Fusion
b)
Half-life
c)
Fission
d)
Fusion or fission
11.
One disadvantage of nuclear energy is ___.
a)
it is a fossil fuel
b)
it leaves behind radioactive waste
c)
it emits large amounts of pollution into the atmosphere
d)
it has low energy efficiency
12.
After the third half-life, how much of a radioactive sample is left?
a)
1/2
b)
1/3
c)
1/16
d)
1/8
13.
If 1/4 of a sample of Hydrogen-2 remains undecayed after 4.60 minutes. How long is the half-life of Hydrogen-2?
a)
4.60 min
b)
2.30 min
c)
1.15 min
d)
0.58 min
14.
If electrons are shared unequally then the bond is....
a)
Non-polar covalent
b)
Ionic
c)
Non-polar ionic
d)
Polar covalent
15.
Metals and nonmetals form which kind of bond?
a)
Polar covalent
b)
Ionic
c)
Non-polar covalent
d)
Metallic
16.
How strongly an atom attracts electrons is called....................
a)
Ionization energy
b)
Electronegativity
c)
Electricity
d)
Nuclear force
17.
Which of the following is the least electronegative element?
a)
oxygen
b)
potassium
c)
fluorine
d)
nitrogen
18.
Put these in order of increasing electronegativity:
F, N, B
F, N, B
a)
B < N < F
b)
B < F < N
c)
N < F < B
d)
F < N < B
19.
As you move down the periodic table atoms get larger. This is because ____________.
a)
The atoms have more mass.
b)
The atoms have more protons.
c)
The atoms have more energy levels
d)
The atoms have more neutrons
20.
Which two elements could form an ionic compound?
a)
carbon and oxygen
b)
hydrogen and nitrogen
c)
lithium and fluorine
d)
boron and neon
21.
Ionic compounds are good conductors of electricity when they are:
a)
shaped into wires.
b)
dissolved in water.
c)
formed into crystals.
d)
made of two metals.
22.
What is the charge on an Aluminium ion?
a)
3
b)
+3
c)
+2
d)
+1
23.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
24.
What is the formula of Sodium oxide?
a)
NaO
b)
NaO2
c)
Na2O2
d)
Na2O
25.
A mixture of two or more metals is called:
a)
mixture
b)
solution
c)
compound
d)
alloy
26.
What is the basis of a metallic bond?
a)
the attraction of neutral metal atoms.
b)
the attraction between protons and neutrons.
c)
the attraction between positive metal ions and interlocking electrons.
d)
the attraction between positive metal ions and free floating electrons.
27.
Why do metals conduct
a)
They are shiny
b)
The electrons are held tightly within the lattice
c)
The electrons are delocalised and able to move
d)
The electrons are shared between two metal ions
28.
A molecule with a single covalent bond is....
a)
HCl
b)
SO
c)
CO
d)
SO2
29.
A molecule with a double covalent bond is....
a)
HCl
b)
SO
c)
I2
d)
N2
30.
Which bond would be the least polar?
a)
H-F
b)
H-O
c)
H-H
d)
H-Br
31.
Which bond would be the most polar?
a)
H-I
b)
H-Br
c)
H-Cl
d)
H-F
32.
How many electrons are shared in a triple bond?
a)
6
b)
3
c)
6 pairs
d)
5
33.
*
a)
trigonal pyramid
b)
linear
c)
bent
d)
angular
34.
*
a)
tetrahedral
b)
trigonal pyramid
c)
angular or bent
d)
trigonal plane
35.
Which of the following most likely represents the molecular geometry of water?
a)
A
b)
B
c)
C
d)
D
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