WorksheetsChemistry Review
Total questions: 40
Worksheet time: 34mins
This symbol indicates a _______.
neutron
proton
electron
What information does a subscript number tell us?
the number of atoms per element
the number of molecules per formula
An electron is located ...
in the nucleus.
outside the nucleus.
What is the atomic mass for this element?
6
12.0107
6.0107
18.0107
How many molecules are in the reactant?
1
2
3
6
What information does the coefficient in an equation give us?
the number of atoms per element
the number of molecules per formula
The center of an atom is called
a/an __________.
atomic mass
nucleus
proton center
energy shell
How many neutrons are in an Calcium atom?
20
40.08
60
Which formula has 6 atoms of Carbon, 12 atoms of Hydrogen, and 6 atoms of Oxygen.
The atomic number of an element is determined by the _________ of ________ in the nucleus.
protons, neutrons
number, electrons
electrons, protons
number, protons
How many total atoms are in the product?
10
5
7
12
In this chemical equation, the elements in red are the_______.
Products
Reactants
Subscripts
Coefficients
What is the atomic number of this atom?
4
5
8
9
Using the information provided, determine how many electrons the a Boron atom contains.
2.5
5
6
10.81
What is made up two or more elements that are chemically combined?
Atom
Element
Compound
Mixture
The smallest part of an element is:
Nucleus
Atom
Electron
Chloroplast
How many compounds are in this list: H , CO2 , Ca , H2O , O , Na
6
2
4
0
How many dots would you put around carbon in a Lewis Dot Diagram, a group 14 element?
4
6
8
18
This could be the dot diagram of
Mg
Cl
C
O
This is a correct dot diagram for neon (Ne)
true
false
How would you draw a Lewis dot diagram for Magnesium?
On the periodic table, Groups are
Horizontal rows
Vertical columns
On the periodic table, Periods are
Horizontal rows
Vertical columns
What is a valence electron?
Electrons in the first energy shell
Electrons in the second energy shell
Electrons in the outer shell
Total number of electrons
The innermost energy level has a maximum of how many electrons?
1
2
6
8
What does the Bohr Model represent?
The structure of molecules
The structure of the Solar System
The structure of an atom
The structure of East Hills
Which element is this?
Nickel
Neon
Sodium
Nitrogen
How many valence electrons?
2
3
4
6
4Fe + 3O2 --> 2Fe2O3
How many silver (Ag) atoms are reactants in this equation?
4Ag + 3O2 → 2Ag2O
4
2
3
1
What coefficient should be used to make the following equation balanced?
N2+O2--> _____NO
1
2
3
4
Which equation is balanced?
PbO2 + 2H2
SO2 + H20 --> H2SO4
2Na + 2H2O --> 2NaOH + H2
Which of the following can be found on the periodic table?
Element
Compound
MIxture
