Chapter 8
Journey Inside the Atom
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

Complete the given table:

Atomic NumberMass NumberNumber of NeutronsNumber of ProtonsNumber of ElectronsName of the Element
5-6---
-14--7Nitrogen
-24-12--
15-16---
-10---

Answer: Verified

The missing entries in the table can be filled using the following relationships:

• Atomic number (Z) = Number of protons = Number of electrons (in a neutral atom)

• Mass number (A) = Number of protons + Number of neutrons

Atomic NumberMass NumberNumber of NeutronsNumber of ProtonsNumber of ElectronsName of the Element
511655Boron
714777Nitrogen
1224121212Magnesium
1531161515Phosphorus
11011Hydrogen
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