Question 632: Atoms & Nuclei

Question

The mass number of a nucleus is

Accepted Answer

Mass number = atomic number + no. of
neutrons
For hydrogen, number of neutrons = 0
So, mass number = Atomic number.
Hence mass number is sometimes equal to atomic
number.

Answer

always less than its atomic number

Answer

always more than its atomic number

Answer

sometimes equal to its atomic number

Answer

sometimes less than and sometimes more than its atomic number

Atoms & Nuclei

The mass number of a nucleus is

Choose the correct answer: