Question

O2- ....Atomic number and newtron number ​

Answer 1

Answer:

The neutron number, symbol N, is the number of neutrons in a nuclide. Atomic number (proton number) plus neutron number equals mass number: Z + N = A. The difference between the neutron number and the atomic number is known as the neutron excess: D = N - Z = A - 2Z.

Answer 2

Answer:

Nitrogen=7

2,5

Neon= 10

2,8

Sodium=11

2,8,1 and other