Question

What are Isotopes, Isobars, Isoters and Isotones? ​

Answer 1

1. Isotopes :

• These are atoms of a given element which have same atomic number but different mass number.

Eg:- $_6^{12}C,\: _6^{13}C, _6^{14}C$

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2. Isobars:

• These are atoms of elements which have the same mass number and different atomic number.

Eg:- $_1^{3}H, \: _2^{3}He$

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3.Isosters:

• They are molecules which have same number of electrons and atoms.

Eg:- $CO_{2}, {N}_{2}O$

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Isotones:

• These are also known as Isoneutronic species or Isotonic.

• They are atoms of different elements which have same number of neutrons.

Eg:- $_{19}^{39}K, \: _{20}^{40}Ca,$

Here, K has 20 neutrons and Ca also has 20 neutrons.

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Know more:

Isodiaphers:

• They are atoms of different element which have the same difference of number of neutrons and protons.

Eg:- $_5^{11}B,\: _6^{13}C$

Answer 2

1. Isotopes :

These are atoms of a given element which have same atomic number but different mass number.

Eg:- _6^{12}C,\: _6^{13}C, _6^{14}C

6

12

C,

6

13

C,

6

14

C

━━━━━━━━━━━━━━━

2. Isobars:

These are atoms of elements which have the same mass number and different atomic number.

Eg:- _1^{3}H, \: _2^{3}He

1

3

H,

2

3

He

━━━━━━━━━━━━━━━

3.Isosters:

They are molecules which have same number of electrons and atoms.

Eg:- CO_{2}, {N}_{2}OCO

2

,N

2

O

━━━━━━━━━━━━━━━

Isotones:

These are also known as Isoneutronic species or Isotonic.

They are atoms of different elements which have same number of neutrons.

Eg:- _{19}^{39}K, \: _{20}^{40}Ca,

19

39

K,

20

40

Ca,

Here, K has 20 neutrons and Ca also has 20 neutrons.

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Know more:

Isodiaphers:

They are atoms of different element which have the same difference of number of neutrons and protons.

Eg:- _5^{11}B,\: _6^{13}C

5

11

B,

6

13

C