Font size
WorksheetsC-2 Review
Total questions: 94
Worksheet time: 1hrs 5mins
Why are ions formed?
To make our lives difficult
Because atoms want to be stable
Because atoms have the same number of protons and electrons
Because atoms gained neutrons
Ionic bonds form between two ions that have
negative charges
positive charges
opposite charges
When an atom loses a valence electron, it becomes a(n) _____________ ion.
positive
negative
neutral
When an atom gains a valence electron, it becomes a(n) _____________ ion.
positive
negative
neutral
Nonmetals are
usually cations
usually anions
Metals are:
Usually cations
Usually anions
Cations are _________________ and anions are _______________
metals, nonmetals
nonmetals, metals
Why do elements bond?
To be friends
To create a new element
To become stable
To get bigger
The octet rules states that most elements want to have _____ valence electrons.
2
4
6
8
Chemical bond is ...
the physical mixing of two different atoms.
the force that holds two atoms together
the energy used up when two atoms combined.
the temperature that changes the phase of matter.
Which of the following atoms is most likely to bond with another atom?
How many valence electrons does Oxygen (O) have?
6
8
15
16
What does the number 3 represent in 4NH3?
Subscript
Superscript
Coefficient
What does the number 4 represent in 4NH3?
Subscript
Superscript
Coefficient
How many Nitrogen (N) atoms are in 4NH3?
4
1
3
12
How many Hydrogen (H) atoms are in 4NH3?
4
1
3
12
How many total molecules is 4NH3?
4
1
3
12
How many total atoms make up 4NH3?
4
16
3
12
In the equation shown, what are the reactant(s)?
N2 + H2
NH3
In the equation shown, what are the product(s)?
N2 + H2
NH3
Is this equation balanced?
Yes
No
Is this equation balanced?
Yes
No
Is this equation balanced?
Yes
No
To balance an equation you should:
ONLY change subscripts.
ONLY change coefficients.
Change BOTH subscripts and coefficients.
Which of the following is a chemical reaction?
Sodium and chlorine atoms bond to form salt molecules.
Ice melts to form water.
Carbon dioxide freezes to form dry ice.
Salt and water mix to form salt water.
Identify the Reactants in this equation.
A
B
What is a chemical equation?
Describes the number of elements in a compound.
One or two letters that represent the elements on the periodic table.
The number to the lower right of an element that shows the number of atoms bonded.
A written description of a chemical reaction.
______ is the end result of a chemical reaction. (Right Side)
Product
Deleting atoms and matter
Subscript
Reactant
What does the Law of Conservation of Matter state?
Matter cannot be created or destroyed in a chemical reaction, it just changes into something new/changes form.
Matter can only be lost in a chemical reaction.
Matter can only be gained in a chemical reaction.
Matter can be gained and lost in a chemical reaction.
Given the equation:
2Na + S --> Na2S
Name the reactant(s).
Na only
S only
Na2S
2Na + S
2Na + S --> Na2S
Name the product(s).
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
yes
no
Name the compound AlBr3
aluminum bromide
aluminum tribromide
aluminum bromine
aluminum boride
