Question

For the hypothetical compound AX2 which statement is true

A. A is a nonmetal from group 3, and X is a metal from group 1.


B. A is a metal from group 1, and X is a metal from group 7


C. A is a metal from group 3, and X is a nonmetal from group 5


D. A is a metal from group 2, and X is a nonmetal from group 7 <-- I believe this is correct.

Answer 1

D. A is a metal from group 2, and X is a nonmetal from group 7

Answer 2

Answer: Option (D) is the correct answer.

Step-by-step explanation:

Metals are the species which tend to lose electrons in order to attain stability. When a metal loses one electron then it acquires a +1 charge and if a metal loses 2 electrons then it acquires a +2 charge and so on.

On the other hand, non-metals are the species which tend to gain electrons in order to attain stability.

When one electron is gained by a non-metal then it acquires a -1 charge and when two electrons are gained by a non-metal then it acquires a -2 charge and so on.

For example, a metal of group 2 will have a +2 charge in ionic form and when it combines with a non metal who needs to gain one or two electrons then the compound formed will be
`AX_(2)`.

As
`MgCl_(2)` can be assumed in place of
`AX_(2)`.

Thus, we can conclude that the statement A is a metal from group 2, and X is a nonmetal from group 7.