Q.5 Give reasons for the following:

1. Occurrence of characteristic properties of elements takes place at definite inte

Q.5 Give reasons for the following:

1. Occurrence of characteristic properties of elements takes place at definite intervals in the mode
periodic table.

2. Properties of elements are periodic functions of their atomic numbers and not atomic weights.

3. Atomic size of an element depends on the nuclear charge of that element.

4. Down a group electronegativity
should increase with increase in nuclear charge but it is seen that t
electronegativity decreases.

5. If combining atoms have nearly similar electronegativities the bond between them is covalent.

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