Question

Any one incident of losing civilisation​

Answer 1

Answer:

Any one incident of losing civilisation

Answer 2

ANSWER

Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.