Name: Groups in the Modern Periodic Table
Uploaded: 2019-07-19
Duration: 2 min 56 s
Description: In a periodic table, characteristics of groups are decided by its shell count, valence electrons, and properties of the elements. Come, let’s explore it to k...

Question

Arrange as directed:

$Ca (20), Be (4), Sr (38), Mg (12)$ belonging to Group 2 of the long periodic table according to decreasing order of reducing power.

(The atomic numbers have been given within first brackets after the symbols of the elements)

Accepted Answer

A reducing agent 'loses electrons'. Group 2 elements have two valence electrons, so they have tendency to lose electron hence they are reducing agents. Reducing power is the potential of a substance to reduce another substance. As we move down, the reducing power increases. This can be explained by atomic size, as we know that as atomic size increase, the nucleus attraction on the valence electron reduces, allowing the element to lose electrons more easily and therefore increasing its reducing power.

Decreasing order of reducing power of given elements are:

$Sr < Ca < Mg < Be$

Arrange as directed:

$Ca (20), Be (4), Sr (38), Mg (12)$ belonging to Group 2 of the long periodic table according to decreasing order of reducing power.

(The atomic numbers have been given within first brackets after the symbols of the elements)

Important Questions on Periodic Table and Periodicity in Properties

Learn and Prepare for any exam you want !

Arrange as directed: Ca (20), Be (4), Sr (38), Mg (12) belonging to Group 2 of the long periodic table according to decreasing order of reducing power. (The atomic numbers have been given within first brackets after the symbols of the elements)

Important Questions on Periodic Table and Periodicity in Properties

Learn and Prepare for any exam you want !

Arrange as directed:

$Ca (20), Be (4), Sr (38), Mg (12)$ belonging to Group 2 of the long periodic table according to decreasing order of reducing power.

(The atomic numbers have been given within first brackets after the symbols of the elements)