Structure of Atom

Element

Isotope Symbol Proton numbe

r

Nucleon

number

No. of proton

s

No. of neutro

n

No. of electro

n

Carbon Carbon-12

6 12 6 6 6

Carbon-13

6 13 6 7 6

Carbon-14

6 14 6 8 6

C126C136C146

Element

Isotope Symbol Proton numbe

r

Nucleon

number

No. of proton

s

No. of neutro

n

No. of electro

n

Oxygen 0xygen-16

8 16 8 8 8

Oxygen-17

8 17 8 9 8

Oxygen-18

8 18 8 10 8

O168O178O188

Element

Isotope Symbol Proton numbe

r

Nucleon

number

No. of proton

s

No. of neutro

n

No. of electro

n

Sulphur Sulphur -32

16 32 16 16 16

Sulphur -34

16 34 16 18 16

S3216S3416

Example:

Example: