valency chart of elements for class 7th
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Metals:(all positive)
Na, K - 1
Mg, Cu, Fe(II), Ca- 2
Al, Fe(III)- 3
Non Metals:(all negative)
Cl, F, I, Br-1
C, O -2
N-3
Hydrogen has +1, although it's a non metal.
But don't try to rote these valencies. It would be best to understand the concept of valence electrons and then understand them. Anyway, for class 7, only these are asked.
Na, K - 1
Mg, Cu, Fe(II), Ca- 2
Al, Fe(III)- 3
Non Metals:(all negative)
Cl, F, I, Br-1
C, O -2
N-3
Hydrogen has +1, although it's a non metal.
But don't try to rote these valencies. It would be best to understand the concept of valence electrons and then understand them. Anyway, for class 7, only these are asked.
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