Science: Class IX>Chapter 4 - Structure of the Atom>Exercises

Exercises

Author:Jharkhand Board

Jharkhand Board Science Solutions for Exercises

Simple step-by-step solutions to Exercises questions of Structure of the Atom from Science: Class IX. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Exercises with Hints & Solutions

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 14

J. J. Thomson proposed that the nucleus of an atom contains only nucleons.

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 14

A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.

MEDIUM

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 14

The mass of an electron is about $\frac{1}{2000}$ times that of proton.

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 14

An isotope of iodine is used for making tincture of iodine which is used as a medicine.

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 15

Rutherford's alpha-particle scattering experiment was responsible for the discovery of

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 16

Isotopes of an element have:

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 17

Number of valence electrons in ${Cl}^{-}$ ion is

EASY

9th Jharkhand Board

IMPORTANT

Science: Class IX>Chapter 4 - Structure of the Atom>Exercises>Q 18

Which one of the following is a correct electronic configuration of sodium?