Question

How to calculate valencey of AlO3

Answer 1

Answer:

Formula of  aluminate is AlO₃ and valancey = -1

formula of chromate is  CrO₄⁻² and valancey = 2

formula of aluminium is AL and valancey = 3

formula of  cupric is Cu(ll) and valancey = 2

Explanation:

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Answer 2

Answer:

Hey mate here your answer

Explanation:

Atomic number of aluminium is 13 so its electronic configuration is 2, 8, 3. Since it has 3 electrons in its valence shell, it will lose 3 electrons to complete its octet hence its valency is +3.