Question

An atom of an element Y has 5 protons , 6 neutrons & 5 electrons Write the atomic no.
mass no.​

Answer 1

Answer:

Atomic no. is 5

Mass no. is 11

Answer 2

Answer:

Atomic number is 5.

Atomic mass number is 11.

Explanation:

Given:

No. Of Protons = 5

No. Of Neutrons = 6

No. Of Electrons = 5

To find:

1. Atomic no. of element

2. Atomic mass no. of element

Solution:

Atomic no. = No. of protons = No. of electrons

=> Atomic no. = 5

Therefore, atomic number is 5.

Now,

Atomic mass no. = No. of Protons + No. of Neutrons

=> Atomic mass no. = 5 + 6

Therefore, atomic mass number is 11.

_________

The element is Boron ( B ).