Question

3. Explain the periodic trends in the modern periodic table in a group and a period on
following points:
a) Valency
b) Atomic size
c) Metallic character​

Answer 1

a)Valency:

a measurement of the power of an atom to combine with others, by the number of hydrogen atoms it can combine with or take the place of.

b)Atomic size:

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons

c) Metallic character:

Metallic character refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as indicated by their low ionization energies. Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities

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Answer 2

Answer:

In each period, metallic character of elements decreases as we move to the right. Elements to the left of the periodic table have a pronounced metallic character while those to the right have a non-metallic character. Conversely, non-metallic character increases from left to right.

Explanation:

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