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If an element A has 3 shells and has 3 valence electrons, write formulas for the following:
a. Nitrate of A

b. Chloride of A

c. Oxide of A

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indrawboy

Electron configuration

an element A has 3 shells and has 3 valence electrons

so electron configuration of A: 1s², 2s², 2p⁶, 3s², 3p¹

will tend to lose 3 electron to form a cation: A³⁺

a. Nitrate of A

A(NO₃)₃

b. Chloride of A

ACl₃

c. Oxide of A

A₂O₃

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