In the periodic table, the maximum chemical reactivity is at the extreme left (alkali metals) and extreme right (halogens). Which properties of these two groups are responsible for this?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Least ionisation enthalpy on the left and highest negative electron gain enthalpy on the right

Non-metallic character on the left and meatallic character on the right

High atomic radii on the left and small atomic radii on the right

Highest elecronegativity on the right

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

High chemical reactivity of alkali metals is due to low ionisation energies. Alkali metals readily lose an electron and form cation with stable noble gas electronic configuration. High chemical reactivity of halogens is due to high negative electron gain enthalpies. Halogens readily accept an electron and form anion with stable noble gas electronic configuration.

Watch 3-min video & get full concept clarity