Q2 of 64 Page 112

Write true or false for the following statements:

Atoms of a given element are identical in mass but different in their chemical properties.

False

Atoms of a given element may be identical in mass or may not as isotopes are also the atoms of the same element but have different masses, but all the atoms have same chemical properties.


Hence, the above statement is false.


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25

The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

 1

Write true or false for the following statements:

Atomic radius is measured in nanometres, 1m = 109nm

 3

Write true or false for the following statements:

Atoms combine in the ratio of small whole numbers to form compounds.

 4

Write true or false for the following statements:

In water, the ratio of the mass of hydrogen to the mass of oxygen is always 1:8, whatever is the source of water.