Worksheets2025 Chemistry Final
Total questions: 21
Worksheet time: 42mins
Name
Class
Date
1.
True or false, freezing point is a chemical property?
a)
True
b)
False
2.
Covalent bonds involve the sharing of electrons, true or false?
a)
True
b)
False
3.
How many significant figures in 0.0425?
a)
1
b)
2
c)
3
d)
4
4.
In order to form N₂, the two atoms will form a double bond.
a)
True
b)
False
5.
Lewis structures, like the one for chlorine below, show the valence electrons available.
a)
True
b)
False
6.
What shape is this molecule?
a)
Linear
b)
Bent
c)
Trigonal pyramidal
d)
Tetragonal
7.
How many energy levels (periods) are there?
a)
1
b)
4
c)
7
d)
18
8.
What element is this?
a)
Boron
b)
Carbon
c)
Argon
d)
Oxygen
9.
Which of the following are halogens?
a)
Bromine
b)
Fluorine
c)
Chlorine
d)
All of the above
10.
What is the formula mass of barium nitrate, Ba(NO₃)₂?
a)
151.7g
b)
261.3g
c)
219.3g
d)
342.1g
11.
True or false, the atomic number is ALWAYS larger than the atomic mass.
a)
True
b)
False
12.
The majority of the periodic table contains metals.
a)
True
b)
False
13.
Magnesium has 2 valence electrons.
a)
True
b)
False
14.
The electron configuration for sodium is 1s²2s²2p⁶3s².
a)
True
b)
False
15.
The electronegativity value for potassium is 0.8, the value for chlorine is 3.0. What type of bond do they form when they react to form potassium chloride?
a)
non-polar covalent
b)
polar covalent
c)
ionic
d)
none of the above as they don't react.
16.
What is the ratio of methane (CH₄), to water?
a)
1:2
b)
2:1
c)
2:2
d)
1:1
17.
What coefficient goes in front of the oxygen molecule to balance this equation: KClO₃ ----> KCl + O₂? (you may need to write this equation out to balance it.
a)
1
b)
2
c)
3
d)
4
18.
What is the mole ratio of HCl to H₂ in this chemical equation: Fe + 2HCl ----> FeCl₂ + H₂
a)
1:1
b)
1:2
c)
2:1
d)
2:2
19.
How many neutrons are in a xenon atom?
a)
54
b)
131
c)
185
d)
77
20.
If an oxygen atoms gains 2 electrons, what is its ionic charge?
a)
2+
b)
2-
c)
0 (neutral)
21.
What type of reaction is this? Explain why this equation is not balanced. Then balance the equation, calculate the molar mass for each element and compound in the equation. Finally, how many moles of iron (III) oxide reacted if 22 moles of iron was produced? (You can show all this on a piece of paper if easier, otherwise type your answers below).
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