PDF chapter test TRY NOW
Match the atom or element with their valency.
| S.No. |
Valency
|
Atom
|
|
1.
|
0
|
|
|
2.
|
1
|
|
|
3.
|
2
|
|
|
4.
|
3
|
|
Answer variants:
S
He
B
Cl
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