Question

Define: 1) Periodic Trend 2) Atomic Size​

Answer 1

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$\small\green {Periodic\: Trend:-}$

Periodic trends are the special pattern of the properties of the chemical elements shown in the periodic table. The major periodic trends that we consider are the electronegativity, ionization enthalpy, atomic size, ionic radii, metallic character etc.

$\small\green {Atomic\:Size:-}$

Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell. In basic chemistry, the atomic radius is defined as the shortest distance between the atom's nuclei and the outermost shell of the atom.

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