Question

std 7 science Metals and non metals answer​

Answer 1

Answer:

What are non-metals? Answer: Substances which are soft and dull, i.e., non-lustrous, non-sonorous, non-ductile, non-malleable and poor conductor of heat and electricity are called non-metals. For example, oxygen, hydrogen, sulphur, etc.

Explanation:

Metal is a substance which is lustrous, sonorous, ductile, and is a good conductor of heat and electricity.

Answer 2

Answer:

metals and non metals have just opposite properties ...

• Metal is very lustrous but non metals are not lustrous.
• Metal are colourful but non metals are not colourful.
• Metals are almost hard but non metal are not hard except diamond .
• Metal are good conductor of electricity whereas non metals are not .

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