Physics
By total number of nucleons, we mean :
- the number of protons + number of electrons
- the number of electrons + number of neutrons
- the number of electrons + number of protons + number of neutrons
- the number of neutron + number of protons
Radioactivity
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Answer
the number of neutron + number of protons
Reason — Nucleons include both protons and neutrons, which are found in the nucleus of an atom. Therefore, the total number of nucleons is the sum of the number of protons and the number of neutrons in the nucleus.
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Related Questions
The total number of protons in a neutral atom is equal to:
- atomic number
- neutrons
- electrons
- both (1) and (3)
If Z is the atomic number and A is the mass number of an atom, then which of the following relations is incorrect ?
- Number of electrons = Z
- Number of protons = A - Z
- Number of neutrons = A - Z
- Number of neutrons + number of protons = A
A certain nucleus P has a mass number 15 and atomic number 7. The number of neutrons is :
- 7
- 15
- 8
- none of the above
The atoms of the same element, having the same atomic number Z but different mass number A are called :
- Isotopes
- Isobars
- Isotones
- None of the above