Question

How many neutrons and protons are there in the following nuclei?

`""_6^13"C"`, `""_8^16"O"`, `""_12^24"Mg"`, `""_26^56"Fe"`, `""_38^88"Sr"`

Answer 1

`""_6^13"C"` -

Atomic mass = 13

Atomic number = Number of protons = 6

Number of neutrons = (Atomic mass) – (Atomic number)

= 13 – 6 = 7

`""_8^16"O"` -

Atomic mass = 16

Atomic number = 8

Number of protons = 8

Number of neutrons = (Atomic mass) – (Atomic number)

= 16 – 8 = 8

`""_12^24"Mg"` -

Atomic mass = 24

Atomic number = Number of protons = 12

Number of neutrons = (Atomic mass) – (Atomic number)

= 24 – 12 = 12

`""_26^56"Fe"` -

Atomic mass = 56

Atomic number = Number of protons = 26

Number of neutrons = (Atomic mass) – (Atomic number)

= 56 – 26 = 30

`""_38^88"Sr"` -

Atomic mass = 88

Atomic number = Number of protons = 38

Number of neutrons = (Atomic mass) – (Atomic number)

= 88 – 38 = 50