Question

Which one of the following property increases down the group

Answer 1

Answer -

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• Therefore, the size of the atom decreases with the increase in atomic number (number of protons). Atomic radius goes on increasing down a group because: i. Down a group, the atomic number increases one by one as a result nuclear charge increases.

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Answer 2

The following property increases down the group

A. Atomic radius

B. Electronegativity

C. Electon affinity

D. Ionization energy

Explanation:

Out of above options atomic radius increases down the group .

Atomic radii

It is the distance from center of nuclei to outermost shell of an atom.

Variation along period:

Along period the size keeps on decreases due to increase in nuclear charge.

Nuclear charge is the attraction of positive charged protons towards electron .

• As we move towards right, the atomic no. increase that is nuclear charge  attraction increase. Therefore , size decreases .

For example,  the order is Li>Be>B>C>N>O>F  for second period

Variation along group:

While moving down ,  there is an addition of shell along group it increases  

•As we move down the group  , a new shell is added due to which   nuclear charge decreases.Therefore size increases .

For example:in first group the order is Li<Na<k<Rb<Cs

• In the whole periodic table alkali group is the largest group according to size