Q8 of 56 Page 82

Give Reasons for the Following:

Atoms of most elements are not able to exist independently. Then how these atoms form the matter that we can feel, see or touch?

Atoms of most elements are not able to exist independently. Atoms form molecules and ions. These molecules or ions aggregate in large numbers to form the matter that we can see, feel or touch.


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6

Calculate the molar mass of the sulphur and phosphorus molecule.

 7

Give Reasons for the Following:

Why is incorrect to say that, ’atoms are indivisible particles’?

 9

Give Reasons for the Following:

It is said that molecules of many elements, such as argon (Ar), helium (He), neon (Ne), etc., are made-up of only one atom of the element. Why is it so?

 10

Give Reasons for the Following:

The atoms of elements such as helium, neon, argon, radon, etc., do not form ions easily. Why is it so?