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WorksheetsAtomic Theory
Total questions: 24
Worksheet time: 19mins
Name
Class
Date
1.
Air is a mixture of several different kinds of molecules.
a)
True
b)
False
2.
The tiniest bit of water that still is water is a molecule of water.
a)
True
b)
False
3.
An oxygen molecule usually has two oxygen atoms.
a)
True
b)
False
4.
Hydrogen is a compound.
a)
True
b)
False
5.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
6.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
7.
an atom with atomic number 6 would have how many protons
a)
6
b)
12
c)
3
d)
cannot be determined
8.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
9.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
10.
What is the atomic number for an element with three protons?
a)
2
b)
1
c)
3
d)
6
11.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
12.
The symbol for Carbon is
a)
6
b)
12.011
c)
C
d)
Ca
13.
Beryllium has how many protons?
a)
4
b)
9.0122
c)
2
d)
13.0122
14.
What are the 3 subatomic particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
15.
Molecules are
a)
2 atoms bound together
b)
2 elements bound together
c)
2 or more atoms mixed together
d)
2 or more atoms bound together
16.
Matter is
a)
everything that has density
b)
everything made of atoms
c)
elements
d)
anything that has mass and takes up space
17.
which one only has one type of atom In it.
a)
Element
b)
compound
18.
If you see the symbols of two elements written side by side then it is an example of a ________________________ .
a)
compound
b)
electron
c)
neutron
d)
molecule
19.
Water consists of molecules that each have two atoms of hydrogen and one atom of oxygen. Water is considered a/an ____________________ .
a)
element
b)
atom
c)
compound
20.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
21.
What do we call a chemical substance made up of 2 or more different types of elements bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
22.
All ____________ are made up of two or more atoms bonded together.
a)
atoms
b)
molecules
c)
electrons
d)
elements
23.
H2O
How many Hydrogen atoms are present?
How many Hydrogen atoms are present?
a)
2
b)
4
c)
1
d)
10
24.
Any sample of matter has mass and takes up space.The main reason for this is because:
a)
All matter is heavy
b)
Matter can be a gas
c)
Matter is made up of tiny particles that have mass and take up space
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