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Atomic Structure, Isotopes and Ions

Total questions: 28

Worksheet time: 28mins

Name
Class
Date
1.
What subatomic particles would you find in the nucleus of an atom?
a)
Protons only
b)
Protons and Neutrons
c)
Neutrons and Electrons
d)
Protons and Electrons 
2.
What subatomic particle is electrically neutral (no charge)?
a)
Proton
b)
Ion
c)
Neutron
d)
Electron
3.
How many protons does this atom have?
a)
2.5
b)
6
c)
5
d)
10.811
4.

In modern atomic models, where are electrons found?

a)
In an electron cloud
b)
In the nucleus
c)
Between protons and neutrons
d)
Floating freely between atoms
5.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

6.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
7.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
8.
which atom has  4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
9.
Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.
a)
true
b)
false
10.
Cations are
a)
positive
b)
negative
c)
on the right side of the periodic table.
d)
nonmetals
11.

Negative ions (anions) form when neutral atoms _________ electrons.

a)
lose
b)
gain
c)
share
12.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
13.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
14.
What is the mass number?
a)
the number of protons
b)
the sum of the number of protons and the number of neutrons in the nucleus of an atom 
c)
the number of electrons
d)
the number of neutrons
15.
an atom with atomic number 6 would have how many protons 
a)
6
b)
12
c)
3
d)
cannot be determined 
16.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
a)
15
b)
31
c)
16
d)
47
17.
An atom has 5 protons and 7 neutrons. What is the mass number of the atom?
a)
5
b)
7
c)
2
d)
12
18.
An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?
a)
30
b)
19
c)
10
d)
38
19.
Outside the nucleus of an atom are these
a)
protons
b)
neutrons
c)
quarks
d)
electrons
20.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
21.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

22.

An atom has 12 protons and 13 neutrons in its nucleus. Which is the correct symbol?

a)
b)
c)
d)
23.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
24.

Anions are...

a)

Positive

b)

Negative

c)

Neutral

25.

An element has 25 protons and 22 electrons. It has a charge of...

a)

3+

b)

3-

c)

2+

d)

1-

26.

A neutral atom always has the same number of protons and ______.

a)

electrons

b)

neutrons

c)

ions

d)

nuclei

27.

How many neutrons are in the given atom?

a)

92

b)

143

c)

235

d)

327

28.

Select all that apply. In the notation 289115 Mc, the number 115 is the

a)

mass number

b)

atomic number

c)

number of neutrons

d)

number of electrons

e)

number of protons

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