Question

if an atom of an element X contains equal number of protons ,neutrons and electrons,and its atomic number and mass number are related as :2A+3Z=140,than find the total number of neutrons present in one atom of element X,also identify element

Answer 1

Answer:

Number of neutrons=20 and element is calcium

Explanation:2(p+n)+3e=140

p=n=e

2n+2n+3n=140

7n=140

n=20

Answer 2

Answer:

No. Of nucleons=40;The element is Calcium.

Explanation:

Here,p=protons,n=neutrons,e=electrons.

Refer to the attachment provided below.