Question

Mass number of isotones A and B are respectively 30 and 31 respectively. If atomic number of B is 15, find out atomic number of A. PLEASE GIVE WITH WORKING.

Answer 1

Answer:and is 14

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Explanation:

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Answer 2

Atomic number of A is 14.

Given:

A and B are isotones.

Mass numbers of A and B are 30 and 31.

Atomic number of B is 15.

To find:

Atomic number of B.

Solution:

Number of neutrons in A = Number of neutrons in B

30 - x = 31 - 15

30 - x = 16

x = 30 - 16

x = 14

So, atomic number of A is 14.

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