Is Matter Around Us Pure — Science STD 9 — Question

Fill in the following blanks:
A colloid is a _________ mixture and its components can be separated by the technique known as __________.

Fill in the following blanks with suitable words:
The three important metalloids are __________ and __________.

The particle which is formed by the loss of electrons by an atom is called _________.

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A mole represents an ____________ number of particles of a substance.

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60g of carbon element are ____________ moles of carbon atoms.

Fill in the blanks in the following statements:
The electron has ________ charge, the proton has _________ charge, and the neutron has _________ charge.

Fill in the blank.
Evaporation of a liquid at room temperature leads to a ______ effect.

Fill in the blanks in the following statements:
The electron has ________ charge, the proton has _________ charge, and the neutron has _________ charge.

Fill in the blanks in the following statements:
Almost all the mass of an atom is concentrated in a small region of space called the __________.

Fill in the following blanks with suitable words:
A mixture of kerosene and petrol can be separated by _________.