Give two example of elements.

एक पंक्ति में उत्तर

Example: Hydrogen, Oxygen is made from atoms containing a single proton and a single electron.

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अध्याय 3: Matter Around Us - Evaluation [पृष्ठ ३९]

अध्याय 3 Matter Around Us
Evaluation | Q V. 9. | पृष्ठ ३९

Choose the most appropriate answer

A solvent of Iodine is

Fill in the blank

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

Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.

State the number of atoms of C₆H₁₂O₆

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

Indicate whether the following statement is true or false:
Metals can be polished.

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

Select the correct answer from the choice given below.
A group of atoms of elements

Give a reason for the following statement:

Components in a mixture are present in varying proportions and not in a fixed proportion.

Select the correct answer from the choice given below to complete the sentence :

Dust in air is an example of _________ mixture.