There are ______ number of known elements. - Science

There are ______ number of known elements.

रिकाम्या जागा भरा

There are 118 number of known elements.

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

पाठ 3 Matter Around Us
Evaluation | Q II. 6. | पृष्ठ ३८

Write true or false

All pure substances have characteristic melting and boiling points.

Give two examples of Metals.

Find the atomicity of the Following molecule:
Dinitrogen Oxide

Fill in the blank
A metal which is a poor conductor of electricity is _______.

Indicate whether the following statement is true or false:
Molecules can exist independently.

Indicate whether the following statement is true or false:
Molecules combine to form atoms

Explain the difference between Metals and non-metals.

Select the correct answer from A, B, C, D & E for the statement given below :

A metalloid.

Assertion: Air is a mixture of elements only.

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

Name the constituents of water.