Elements are made up of______ kinds of atoms.

रिकाम्या जागा भरा

Elements are made up of same kinds of atoms.

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

पाठ 3 Matter Around Us
Evaluation | Q II. 4. | पृष्ठ ३८

Correct the following statement:

CO and Co both represents cobalt.

Write the Chemical Name of the Following and Also Give Their Molecular Formulae:

Marble

Name: a Metal Which is brittle

Give two examples of the following.
Inert gases

Define: Molecule

Give one use of the following substance:
Coal

Give reason: Graphite is used to make a lead of the pencils.

Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.

Tick (√) the correct alternative from the choice given for the following statement.
All pure substances have

Assertion: Air is a mixture of elements only.

Reason: Only nitrogen, oxygen and neon gases exist in air.