WorksheetsAtoms & Molecules
Total questions: 26
Worksheet time: 21mins
Name
Class
Date
1.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
2.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
3.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
4.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
5.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
6.
True or False? Neutrons have a negative charge
a)
True
b)
False
7.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
8.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
9.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
10.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
11.
The subatomic particle with a negative charge is the
a)
electron
b)
proton
c)
neutron
d)
nucleus
12.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
13.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
14.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
15.
Electrons are___________
a)
Extremely small even in comparison to protons.
b)
part of the nuclues.
c)
Super Positive, like cheerleaders!
d)
very large
16.
Which particle has a similar mass to a proton?
a)
Electron
b)
Neutron
c)
Photon
d)
Marble
17.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
18.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
19.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
20.
All ____________ are made up of two or more atoms bonded together.
a)
atoms
b)
molecules
c)
electrons
d)
elements
21.
A recipe for a chemical substance is called a ________ _________.
a)
coefficent
b)
chemical formula
c)
Oxygen
d)
atom
22.
H2O2← ?
This number tells the number of atoms present.
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
23.
→2H2O
This number tells how many molecules are in a chemical equation.
This number tells how many molecules are in a chemical equation.
a)
coefficient
b)
subscript
c)
compound
d)
element
24.
2H2O
How many Hydrogen atoms are present?
How many Hydrogen atoms are present?
a)
2
b)
4
c)
1
d)
10
25.
2H2O
How many Oxygen atoms are present?
How many Oxygen atoms are present?
a)
2
b)
4
c)
1
d)
5
26.
2H2O
How many H2O molecules are present?
How many H2O molecules are present?
a)
1
b)
4
c)
2
d)
8
100 %
