WorksheetsChemistry CCA
Total questions: 23
Worksheet time: 24mins
Name
Class
Date
1.
In the equation below , what are the PRODUCTS
2 H2 + O2 → H2O
2 H2 + O2 → H2O
a)
2 H2 + O2
b)
H2O
2.
If you see a change in color, the production of a gas, or the formation of a precipitate it is showing a ______________
a)
physical change
b)
chemical change
3.
How many atoms are in Cl2
a)
1
b)
2
c)
3
d)
215
4.
In the equation below , what are the Reactants
2 H2 + O2 → H2O
2 H2 + O2 → H2O
a)
2 H2 + O2
b)
H2O
5.
All atoms have a ___________ in the center.
a)
electron
b)
cloud
c)
nucleus
d)
particle
6.
How many atoms are in Cl2
a)
1
b)
2
c)
3
d)
215
7.
Horizontal rows in the periodic tabled are called what?
a)
Periodites
b)
Tables
c)
Periodics
d)
Periods
8.
True or False? Vertical rows in the periodic table are called groups.
a)
True
b)
False
9.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
10.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
11.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
12.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
13.
What is the left part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
14.
What is the right part of a chemical equation called?
H2 + O → H2O
H2 + O → H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
15.
Is this balanced?
2HgO → 2Hg + O2
2HgO → 2Hg + O2
a)
Yes
b)
No
16.
True or False? Neutrons have a negative charge
a)
True
b)
False
17.
What is made up two or more elements that are chemically combined?
a)
Element
b)
Mixture
c)
Compound
d)
Solids
18.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
19.
All matter is made of what?
a)
energy
b)
atoms
c)
electrons
d)
compounds
20.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
21.
electrons have this type of charge?
a)
negative
b)
positive
c)
neutral
22.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
23.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
100 %
