Question

9. Name te following:
a) A lustrous liquid metal .
b)A liquid non metal .
c)A metal which can be cut with a knife
d)A non metal which is a good conductor
of electricity
e)An element which melts when kept on
the palm
f) The best conductor of heat
9:21 am​

Answer 1

Name of the elements:

1. A lusturous liquid metal - Mercury
2. A liquid non metal - Bromine
3. A metal which can be cut with a knife - Sodium
4. A non metal which is a good conductor of electricity - Graphite
5. An element which melts when kept on the palm - Galium
6. The best conductor of heat - Silver

Explanation:

The above examples are mostly exceptions of physical properties of metals and non metals. Like metals are mostly solid, but mercury is the only non metal. Similarly, Bromine is the only liquid non-metal. Metals have high density, but Sodium can be cut by knife. Non-metal are bad conductor of electricity and heat, But Graphite a allotrope of carbon, is a good conductor of electricity and heat. Like Mercury, Galium also melts on hand just little above the room temperature.

➤ $\bf{\purple{Here,}}$ Silver is the best conductor of heat but silver is very expensive, so instead copper, aluminium and iron is used$.$

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Answer 2

Answer:

same as above

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