How many
neutrons are
in an
atom
an
atom
of of
carbon-14?
He
4
2
How many
neutrons are
in an atom of
sodium-23?
H
3
1
An atom of
boron-10 has
how many
neutrons?
F
19
9
How many
neutrons are
in the isotope
lithium-6?
N
15
7
How many
neutrons are
in the isotope
oxygen-16?
© Haney Science
Lithium-6 has
Hydrogen-3 has
Carbon-14 has
3 neutrons
2 neutrons
8 neutrons
6–3=3
3–1=2
14 – 6 = 8
Nitrogen-15 has
Boron-10 has
Helium-4 has
8 neutrons
5 neutrons
2 neutrons
15 – 7 = 8
10 – 5 = 5
4–2=2
Oxygen-16 has
Fluorine-19 has
Sodium-23 has
8 neutrons
10 neutrons
12 neutrons
16 – 8 = 8
19 – 9 = 10
23 – 11 = 12
How many
neutrons are in
an atom of
neon (Ne) that
has a mass
number of 20?
Be
9
4
How many
neutrons are
in an atom of
hydrogen-1?
C
13
6
An atom of
argon-40 has
how many
neutrons?
28
14
Si
How many
neutrons are
in the isotope
chlorine-35?
31
15
P
How many
neutrons are in
an atom of
chlorine (Cl)
with a mass
number of 37?
© Haney Science
Chlorine-35 has
Carbon-13 has
Neon-20 has
18 neutrons
7 neutrons
10 neutrons
35 – 17 = 18
13 – 6 = 7
20 – 10 = 10
Phosphorous-31
has
Argon-40 has
Beryllium-9 has
22 neutrons
5 neutrons
40 – 18 = 22
9–4=5
Silicon-28 has
Hydrogen-1 has
20 neutrons
14 neutrons
0 neutrons
37 – 17 = 20
28 – 14 = 14
1–1=0
16 neutrons
31 – 15 = 16
Chlorine-37 has
What is the
mass number of
a nitrogen (N)
atom that has 7
neutrons?
What is the
mass number of
the isotope of
carbon that has
6 neutrons?
What is the
mass number
of a hydrogen
atom that has
1 neutron?
What is the
mass number of
the isotope of
lithium that has
4 neutrons?
What is the
mass number of
a magnesium
(Mg) atom that
has 12
neutrons?
What is the
mass number
of the isotope
of sulfur (S)
that has 16
neutrons?
What is the
mass number of
an aluminum
(Al) atom that
has 14
neutrons?
What is the
mass number of
the isotope of
helium that has
3 neutrons?
What is the
mass number of
an argon (Ar)
atom that has
23 neutrons?
© Haney Science
Mass Number:
Mass Number:
Mass Number:
2
12
14
1+1=2
6 + 6 = 12
7 + 7 = 14
Mass Number:
Mass Number:
Mass Number:
32
24
7
16 + 16 = 32
12 + 12 = 24
3+4=7
Mass Number:
Mass Number:
Mass Number:
41
5
27
18 + 23 = 41
2+3=5
13 + 14 = 27