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WorksheetsUnit 2 Test Review
Total questions: 23
Worksheet time: 23mins
In chemical formulas, what do the tiny numbers (subscripts) represent?
The number of molecules
The number of atoms of the element
The number of chemical reactions
The number of products formed
How many molecules of Na2SO4 are present?
1
2
3
4
How many atoms of Sodium are present?
3
6
12
9
Is the chemical equation 2Fe₂O₃ + 3C → 4Fe + 3CO₂ balanced?
Yes, it is balanced.
No, there are more carbon atoms on the reactant side.
No, there are more oxygen atoms on the product side.
No, there are more iron atoms on the product side.
Is the chemical equation Br + 3Li₂ → LiBr₂ balanced?
Yes, it is balanced.
No, there are more lithium atoms on the reactant side than the product side.
No, there are more bromine atoms on the product side than the reactant side.
No, there are more lithium atoms on the product side than the reactant side.
The law of conservation of mass states that matter (a) be (b) or destroyed, it can only (c) forms. This means there (d) be the same (e) and type of atoms on both sides of a chemical equation.
Match the following
Ion
an atom with a charge
Cation
an atom with a positive charge
Anion
an atom with a negative charge
Ionic bonds
bond metals to non-metals
Covalent bonds
bond non-metals to non-metals
Match the group to its oxidation number.
Alkali Metals
+1
Alkaline Earth Metals
+2
Nitrogen Group
-3
Halogens
-1
Noble Gases
0
Label the PTOE correctly.
Metals
Non-metals
Metalloids
One more non-metal
Select the period.
Select the group.
NaCl is an example of what kind of bond?
Ionic
covalent
metallic
trick question, it's table salt
When sodium and chlorine bond, 2 ions are formed. Label the Cation and the Anion?
SiCl4 is an example of what kind of bond?
Ionic
covalent
metallic
I was sleeping that day.
Au2 is an example of what kind of bond?
Ionic
covalent
metallic
Metallica is the greatest metal band ever.
The image illustrates (a) diagrams and shows the number of (b) . The CO2 molecule has 2 (c) bonds and the water molecule has 2 (d) bonds.
The image shows (a) models and illustrates the number of (b) in each atom. Lithium has 2 energy levels and (c) electrons. (d) has 3 energy levels and (e) electrons
Match the terms to the image.
What is the correct name for this molecule?
H2O
hydrogen oxide
monohydrogen dioxide
water
Select the correct chemical formula for Aluminum fluoride.
AlF3
Al1F3
AlF
Al2F3
Select the correct chemical formula for Nitrogen dioxide.
NO2
N1O2
N3O4
O2N
Match the. terms to the image
What mass of Li would be present on the reactant side of the equation? just the number, no units
(a)
