Question

Atomic number and mass number of hydrogen is same because ________.
A) Does not contain any proton B) Does not contain electron
C) Does not contain neutron D) Does not have isotopes

Answer 1

Atomic number and mass number of hydrogen is same because does not contain neutron

Step by step explanation:

The chemical symbol of hydrogen atom - "H"

Atomic number indicates the number of protons in the atom nucleus.

Atomic number of Hydrogen atom is 1.

Mass number indicates the number of neutrons plus number of protons plus number of electrons.

Hydrogen nucleus contain only one proton and no neutrons.

Hence, the mass number of hydrogen is one not two.

Therefore, mass number and atomic number of hydrogen is same.

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Answer 2

Answer:

Explanation:

The correct option is ( c )

Hydrogen does not contain any neutron and have a single proton and single electron