Name: a Liquid Metal

एक शब्द/वाक्यांश उत्तर

Mercury

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अध्याय 3: Elements, Compounds and Mixtures - Exercise 3 (A) [पृष्ठ २४]

अध्याय 3 Elements, Compounds and Mixtures
Exercise 3 (A) | Q 5.4 | पृष्ठ २४

Fill in the blank

A pure substance has definite.................. and constant ..............

Why is it necessary to separate the constituents of a mixture.

Name: A form of carbon used as a gem

Name: Two substances used to make jewellery.

The important physical properties of substances are colour, odour, nature, density & solubility in water.

Name - a poisonous gas almost as heavy as air.

Select the correct answer from the choice given below.
An element which is a poor conductor of heat

State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.

There are ______ number of known elements.

Give two example of elements.

Reason out

Elements are called semimetals.