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7th Tamil Nadu Board
IMPORTANT
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Non-metal conducting electricity: (Oxygen/Diamond/Graphite) :: Metal conducting electricity: Copper.

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Important Questions on Matter Around Us

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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q III

Elements: combine to form compounds:: Compounds: _____.

Choose from the bracket (can be split into elements/cannot be split into elements).

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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q III
Atoms: fundamental particle of an element :: _____: fundamental particles of a compound.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q IV
Two different elements may have similar atoms.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q IV
Compounds and elements are pure substance.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q IV
Atoms cannot exist alone; they can only exist as groups called molecules.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q IV
NaCl represents one molecule of sodium chloride.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q IV
Argon is monoatomic gas.
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7th Tamil Nadu Board
IMPORTANT
Tamil Nadu Board Class 7 Science Term 1>Chapter 3 - Matter Around Us>Evaluation>Q V

Write the chemical formula and name the elements present in the following compound.

Sodium chloride.