Question
An atom X has 4 protons and 5 neutrons with electronic configuration 2, 2. Give information about its.
- Atomic number.
- Mass number.
- Valency.
✓
Answer
Protons = 4Neutrons = 5
Number of protons = Number of electrons
Number of electrons = 4
Electronic Configuration
= 2, 2
Number of Valence electrons in the outermost shell = 2
Valency = 2
Number of protons = Number of electrons
Number of electrons = 4
Electronic Configuration
= 2, 2
Number of Valence electrons in the outermost shell = 2
Valency = 2
- Since, protons =electrons = atomic no.
- Mass Number = No. of Protons + No. of Neutrons
- Now electronic distribution, K = 2, L = 2
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