The basis of long form of periodic table is:

Atomic number

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Mass number

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Ionic radius

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Atomic weight

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Solution

The correct option is A
Atomic number

In long form of periodic table elements are arranged in increasing order of their Atomic number.

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Similar questions

Which of the following statement is correct in regard to the classification of elements?

(a) Elements in the modern periodic table are arranged on the basis of increasing atomic numbers

(b) Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers

(c) In the modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.

(d) In the modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.

In the modern periodic table, the elements are arranged on the basis of their increasing atomic number.

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