Challenger App

No.1 PSC Learning App

1M+ Downloads
Identify the element which shows variable valency.

AHelium

BMagnesium

CSodium

DIron

Answer:

D. Iron


Related Questions:

ഹൈഡ്രജൻ കണ്ടുപിടിച്ചത് ആര് ?
How many number of bonds do the single carbon atom form?
In Newland’s law of octaves, the first element is ____ and the last known element is ____.?
Lanthanides along with which two elements are sometimes called 'rare earth elements'?
W ഏത് മൂലകത്തിന്റെ പ്രതീകമാണ് ?