Identify the element which shows variable valency.
AHelium
BMagnesium
CSodium
DIron
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Related Questions:
Which factor(s) led scientists towards the classification of elements?
- (i) Different methods of synthesis of elements
- (ii) Different source of elements
- (iii) Different properties of elements
തെറ്റായ പ്രസ്താവനയേത് ?
Which among the following is a micronutrient ?
ഉപലോഹത്തിന് ഒരു ഉദാഹരണമേത് ?
Which element is in chlorophyll?