EASY
7th CBSE
IMPORTANT
Earn 100

The number of protons is equal to the number of in an atom.

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Important Questions on Matter and Chemical Formulae

MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 1
An _____is formed when an atom loses or gains electrons.
EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 2
Atoms of two different elements are_____.
EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 2
Oxygen molecule has _____atoms.
EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 2
The constituent elements of a _____ lose their own properties.
EASY
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 2
The constituents of a compound combine in_____ratio. (fixed / indefinite)
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 2
The constituents in a_____can be separated by simple physical methods.
MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 3
Match the following;
a. CO2 p It is diatomic
b. N2 q. It is an element
c. Gold r. A molecule of a compound
d. Valency s. Its symbol is Ag
e. Silver t. Combining the capacity of an element

 

MEDIUM
7th CBSE
IMPORTANT
Expanded Universal Science 7>Chapter 5 - Matter and Chemical Formulae>TRACK YOUR PROGRESS>Q 4
The symbolic representation of a chemical reaction