Question

An atom contains 12 protons and 12 neutrons..What is it:-
1. Electron
2. Atomic No.
3. Mass No.

Answer 1

Answer:

1. )No of electrons = No of protons in an neutral atom

So No of electrons = 12

2.) Atomic no = protons or no of electrons = 12

3. Mass = no of protons+no of neutrons = 12+12 = 24 Amu

hope it hrlpd....

Answer 2

1. Electron: 12

2. Atomic No: 12

3. Mass No: 24

• The number of electrons in an atom is equal to the number of protons of that atom. So, the number of electrons of the atom is 12.
• The atomic number of an atom is equal to the number of electrons. So, the atomic number is also 12.
• Again the mass number is the sum of the number of neutrons and the number of protons. So the mass number is 12+12=24.