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WorksheetsIntroduction to Atoms
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
Dalton's model of the atom was ...
a)
a solid sphere
b)
a sphere with embedded electrons
c)
a small nucleus with circling electrons
d)
none of these
2.
The Gold Foil experiment was the work of which scientists?
a)
JJ Thompson
b)
Dalton
c)
Ernest Rutherford
d)
Niels Bohr
3.
Protons have a ___ charge
a)
neutral
b)
negative
c)
positive
d)
square
4.
Electrons have a ___ charge
a)
positive
b)
neutral
c)
negative
d)
strange
5.
Neutrons are ____
a)
neutral
b)
positive
c)
negative
d)
oval
6.
AMU stands for
a)
atoms must unify
b)
atomic mass utility
c)
atomic mass unit
d)
a mini unicorn
7.
The particle with the LEAST mass is the
a)
proton
b)
electron
c)
neutron
d)
nucleus
8.
According the the text, the mass number is the sum of these two particles.
a)
protons and electrons
b)
neutrons and electrons
c)
electrons and nucleus
d)
protons and neutrons
9.
One nanometer is equal to
a)
1 meter
b)
0.005 meters
c)
0.000000001 meters
d)
10
10.
Protons and neutrons each have an AMU of
a)
1.0
b)
2.0
c)
0.5
d)
1/1840
11.
Bohr's atomic model is said to resemble planets orbiting the sun or
a)
seeds in a watermelon
b)
rings in a tree
c)
the pit of a cherry
d)
curls of smoke
12.
The current model is referred to as the _____model
a)
fog
b)
haze
c)
new
d)
cloud
13.
In modern atomic theory, electrons move rapidly around a nucleus determined by their
a)
direction
b)
energy level
c)
electric charge
d)
shape and color
14.
The nucleus of an atom contains
a)
protons and electrons
b)
electrons and neutrons
c)
protons only
d)
neutrons and protons
15.
Atoms having the same number of protons and electrons are said to have a _____ charge.
a)
positive
b)
neutral
c)
negative
d)
super
16.
It takes about ____ electrons to equal the mass of one proton.
a)
1840
b)
2
c)
1,000,000,000
d)
0.009
17.
The atomic number is the number of ____ in an atom.
a)
neutrons
b)
protons
c)
protons and neutrons
d)
electrons
18.
The atoms' identity is its' number of ....
a)
protons
b)
protons and neutrons
c)
neutrons
d)
electrons
19.
Atoms of the same element with different numbers of neutrons are called ...
a)
isomers
b)
isotopes
c)
radioactive
d)
mutations
20.
Gold has a mass number of 197. Mass numbers are the
a)
sum of protons and electrons
b)
sum of neutrons and electrons
c)
sum of protons and neutrons
d)
difference of protons and neutrons
21.
Carbon -14 has six protons and ___ neutrons.
a)
6
b)
7
c)
8
d)
9
22.
An element with an atomic number of 9 and a mass number of 20 has ___ neutrons.
a)
9
b)
10
c)
11
d)
12
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