Name: Types of Mixtures
Uploaded: 2019-07-19
Duration: 5 min 1 s
Description: This chemistry video tutorial explains the differences between homogeneous and heterogeneous mixtures within the subtopic classification of matter. Watch!

Question

What is meant by valency? Write the valency of

Na, Mg, Ca

and

Al

.

Accepted Answer

The term valency is defined as the combining capacity of an atom or element. That is, it is the ability of an atom to lose or gain electrons in order to achieve the noble gas configuration.

Electronic configuration of ${}_{11}{Na}$ $= 2, 8, 1$

Since, the valence shell contains one electron which can easily be lost by sodium atom to attain its octet. Hence, its valency is $1$

Electronic configuration of ${}_{12}{Mg} = 2, 8, 2$

Since, the valence shell contains two electrons which can easily be lost by magnesium atom to attain its octet. Hence, its valency is $2$ .

Electronic configuration of ${}_{20}{Ca} = 2, 8, 8, 2$

Since, the valence shell contains two electrons which can easily be lost by calcium atom to attain its octet. Hence, its valency is $2$

Electronic configuration of ${}_{13}{Al} = 2, 8, 3$

Since, the valence shell contains three electrons which can easily be lost by aluminium atom to attain its octet. Hence, its valency is $3$ .

What is meant by valency? Write the valency of $Na, Mg, Ca$ and $Al$ .

Important Questions on Elements, Compounds and Mixtures

Learn and Prepare for any exam you want !

What is meant by valency? Write the valency of Na, Mg, Ca and Al.

Important Questions on Elements, Compounds and Mixtures

Learn and Prepare for any exam you want !

What is meant by valency? Write the valency of $Na, Mg, Ca$ and $Al$ .