Question

All the elements of group IIA are less reactive than alkali metals. this is because these elements have: (a) High Ionization energies (b) Relatively greater atomic sizes (c) similar electronic configuration (d) Decreased nuclear charge

Answer 1

Modern periodic law states that the physical and chemical properties of elements are a periodic function of their atomic numbers i.e., if the elements are arranged in the order of their atomic numbers, the elements with similar properties are repeated after definite regular intervals.

Concept Insight: The elements are characterized by their atomic number as well as atomic weight. Modern periodic law uses atomic number which is number of protons or number of electrons present in an atom of an element.

Answer 2

Answer:

relatively greater atomic size

Explanation:

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