The first letter of an element is always written in ______ letter.

रिक्त स्थान भरें

The first letter of an element is always written in capital letter.

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अध्याय 3: Matter Around Us - Evaluation [पृष्ठ ३८]

अध्याय 3 Matter Around Us
Evaluation | Q II. 8. | पृष्ठ ३८

What is meant by 2H and H₂

Answer the following question:
When iron is mixed with sulphur at room temperature, it does not form a compound. Why?

Draw a labelled diagram of an atom including its nucleus, orbits & their contents.

State what are radicals. Give the names of the radicals –

(a) NO₃
(b) OH
(c) SO₄
(d) CO₃

Select the correct answer from the choice given below.
An impure substance

Write the names of elements from the following symbol:

Select the correct answer to the statement given below:

A non-metal which exists in the liquid state.

Give an example of two liquids which form homogenous.

Give a reason for the following statement :

Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.