MCQEasy1 mark
Select the correct option for each of the following questions.
Elements A and B have electronic configurations 8 and 13 respectively. The chemical formula formed between A and B will be:
Topic: Periodic properties and trends
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(d) B₂A₃.
Explanation
A has valency 2 and B has valency 3; cross-combination gives B₂A₃.
In words
B₂A₃.
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