Question

an atom of element has 11 protons, 11 electrons and 12 neutrons so atomic mass of atom =??​

Answer 1

Explanation:

atomic mass of atom = mass of protons+mass of neutrons

= 11+12

= 23

atomic mass of atom. is 23

Answer 2

Answer:

No. of protons=11

No. of neurons= 12

As we know that atomic no. Z =no. of protons

Therefore, Z=11

Atomic mass =Atomic number Z+ no. of neutrons

$= 11 + 12 = 23$