an element X forms a compound XH3 with hydrogen . another element Y forms a comound YX2 with X what are the valencies of X and Y
Answers
Answered by
67
Hi friend,
Answer:-
X = -3
Y = +6
Reasons:-
As the sign would be reversed in case of oxidation state.
Hydrogen must probably have (-1)
In case of YX2 we found that
X=-3
Then -3-3=-6
Hope I helped you a little!!!!
Answer:-
X = -3
Y = +6
Reasons:-
As the sign would be reversed in case of oxidation state.
Hydrogen must probably have (-1)
In case of YX2 we found that
X=-3
Then -3-3=-6
Hope I helped you a little!!!!
Arjenton:
first metal is placed then nonmetal in a symbol that is the basic of chemistry
OK so what???
so since x is placed before hydrogen therefore it is a covalent compound in which x is the metal since in a covalent compound hydrogen plays the role of a nonmetal
Answered by
6
- The element X forms a compound XH3 with hydrogen. The valence of H is 1. So, the compound requires 3 hydrogen atoms to complete its octet.
- We can say that the valency of X in this compound is 3.
- Note: Here it is not mentioned that element X is a metal or none metal. So we cannot clearly say that valency for X is +3 or - 3. If X is metal then, Hydrogen will be (-1). So, then the valency for X will be +3. If element X is non-metal then Hydrogen will be in (+1) state. Then the valency of the element will be -3.
- For compound, YX2 Y needs 2 atoms of an element X. As we know from the above valency of X is 3. So, for 2 atoms its valency will be 6.
- Therefore, the valency of Y is 6.
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