Identify the element which shows variable valency.
AHelium
BMagnesium
CSodium
DIron
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
Which one of the following elements is used in the manufacture of fertilizers ?
Deficiency of which element is the leading preventable cause of intellectual disabilities in world:
______ is used to provide inert atmosphere.
The most abundant element in the universe is:
Valence shell is the ________ shell of every element?