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Question

The mass of electron, proton and neutron in grams are :
  1. 1.108×1028,1.6726×1024,1.675×1024
  2. 9.108×1028,1.6726×1024,1.675×1024
  3. 9.108×1024,1.6726×1024,1.675×1024
  4. 9.108×1028,1.6726×1024,1.675×1024

A
9.108×1028,1.6726×1024,1.675×1024
B
1.108×1028,1.6726×1024,1.675×1024
C
9.108×1024,1.6726×1024,1.675×1024
D
9.108×1028,1.6726×1024,1.675×1024
Solution
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An electron is a tiny particle with a mass of 9.108×1028 g and a negative charge. All neutral atoms contain electrons. The mass of a proton is 1.6726×1024 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 1.675×1024 g. It is very close to that of the proton. A neutron carries no charge.

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