Question

1.p all the mass of an atom is concentrate in nucleus? give its scientific reason?​

Answer 1

Answer:

The electrons have a negative charge and very little mass. Most of the mass of the atom is concentrated in the nucleus, which has a positive charge. The positive charge in the nucleus is balanced by the negative electrons, making an atom neutral.

Answer 2

Explanation:

Total mass of an atom

= number of protons + number of neutrons

since both the protons and neutrons are present in the nucleus of an atom, therefore total mass of an atom is concentrated in the nucleus. mass of electrons is so small that it is negligible.