Chemistry WAEC

An element X with electronic configuration 1s² 2s² 2p6 3s² combines with another element Y with the configuration 1s² 2s² 2p6 3s² 3p5. What is the formula of the compound formed?

A. X2Y5
B. X2Y3
C. XY3
D. XY2

Correct Answer: Option D

D. XY2

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6 years ago

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