Question

2. Give reason:
a. Atomic size decreases as we move from left across a period

b. Size of cation is smaller than parent atom​

Answer 1

Answer:

I haven't done this question

Answer 2

Answer:

a. As we go left to right in a period, the atomic size or atomic radius increases with the increase in atomic number. Increase in atomic number leads to an increase in the number of protons and electrons in the atoms. Due to the large neuclear charge (positive charge of the nucleus), the electrons are pulled in more close to the nucleus and the size of atom decreases.

b. Cations are the atoms or molecules which have lost one or more electrons given in a net posture charge on the atom or molecule. This is because since now the number of protons is greater than the number of electrons. Hence, there is a net posture charge, and atom is not neutral anymore. Therefore, because of this loss of electron in forming a cation, the size of the cache and is smaller than its parent atom.

Explanation:

HOPE THIS HELPS U MY FRIEND...

PLZZ MARK AS BRAINLIST AND LIKE MY ANS. IF IT HELPS U....