Chemistry
Nucleus of an atom is composed of :
- Electrons and neutrons
- Protons and neutrons
- Protons, neutrons and electrons
- Electrons and protons
Related Questions
An atom having 3 protons and 4 neutrons will have a valency of :
- 3
- 7
- 1
- 4
Elements with valency 2 are:
- Always metals
- Always non-metals
- Can be metals or non-metals
- Metalloids (semi metals)
There are 3 electrons in M shell of an atom. Its atomic number is:
- 11
- 13
- 15
- 3
The maximum number of electrons that M shell can occupy is:
- 18
- 8
- 2
- 10