Question

Define periodic properties ? How do the following change in groups and periods ?

a) Atomic Radius
b) Ionisation energy
c) Election Affinity
d) Nature of oxides of elements

The above is Inter 1st year question of Telengana Syllabus of physics subject.

IT IS 8 MARKS QUESTION

please answer if u really know the answer perfectly.​

Answer 1

Answer:

Atomic radius- the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons. the atomic radius increases as the group increases. As you move across a period, atomic radius decreases.

Ionisation energy- the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule. down a group, the ionisation energy decreases.

Electron affinity- The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion. Electron affinity generally increases across a period. As you move down a group, electron affinity decreases.

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