Question

The mass of electron, proton and neutron in grams are :

• A. $1.108\times {10}^{-28},1.6726\times {10}^{-24},1.675\times {10}^{-24}$
• B. $9.108\times {10}^{28},1.6726\times {10}^{24},1.675\times {10}^{24}$
• C. $9.108\times {10}^{-24},1.6726\times {10}^{-24},1.675\times {10}^{24}$
• D. $9.108\times {10}^{-28},1.6726\times {10}^{-24},1.675\times {10}^{-24}$

Answer 1

The correct option is D $9.108\times {10}^{-28},1.6726\times {10}^{-24},1.675\times {10}^{-24}$

An electron is a tiny particle with a mass of $9.108\times {10}^{-28}$ g and a negative charge. All neutral atoms contain electrons. The mass of a proton is $1.6726\times {10}^{-24}$ g, or about 1836 times the mass of an electron. The proton carries a positive electrical charge, that is equal in magnitude to the charge of the electron but opposite in sign. Mass of a neutron is $1.675\times {10}^{-24}$ g. It is very close to that of the proton. A neutron carries no charge.