MEDIUM
7th CBSE
IMPORTANT
Earn 100

Predict the valency of S in SO2 with respect to oxygen.

Important Questions on Atomic Structure

EASY
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 6
If the valency of Na is 1 and O is 2, what will be the formula of sodium oxide?
MEDIUM
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 1
Write the findings of the Rutherford gold leaf experiment.
MEDIUM
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 2
Can an atom exist with no electron in it? Explain.
MEDIUM
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 3
What are the three sub-atomic particles present in an atom? Tabulate their mass and charge.
EASY
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 4
Valencies of K=1 and Cl=1. Write the formula of the following compound:
Potassium chloride.
EASY
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 4
Valencies of Mg=2 and Cl=1. Write the formula of the following compound:
Magnesium chloride.
EASY
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 4

Valencies of O=2 and ferrous =2 . Write the formula of the following compound:

Ferrous oxide.

EASY
7th CBSE
IMPORTANT
Focus Science Social Science Class 7 Term I>Chapter 4 - Atomic Structure>Evaluation>Q 4
Valencies of Ca=2 and O=2. Write the formula of the following compound:
Calcium oxide.