Physics
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
Related Questions
The total number of protons in a neutral atom is equal to:
- atomic number
- neutrons
- electrons
- both (1) and (3)
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
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