wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of the following statement is correct?

A
Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
In both the alkali metals and the halogens, the chemical reactivity decreases with increase in atomic number down the group.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group.
In alkali metals, the reactivity increases down the group due to a decrease in first ionization enthalpy.

But in the case of halogens, the reactivity decreases down the group due to a decrease in their electron gain enthalpy.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Ionization Enthalpy
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon