I have a test coming up, please explain how to find each answer. Thank you! 1) O

Question

I have a test coming up, please explain how to find each answer. Thank you!

1) Of the following elements, which one is most likely to form an ion through the loss of two electrons?

A. sulfur

B. aluminum

C. strontium

D. sodium

E. chlorine

2) Of the following elements, the one that forms cations with varying positive charges is:

A. iron, Fe

B. sodium, Na

C. aluminum, Al

D. strontium, Sr

E. nitrogen, N

3) Which of the following ions is most likely to combine with an anion to form an insoluble salt?

A. ammonium

B. silver

C. potassium

D. sodium

E. sulfide

Explanation / Answer

1.

Strontium is a second group element and it can loose two electrons

So option "c" is correct

2.

Iron ia a d-block element and it can forms variable oxidation states like +2 & +3

so optin "a" is correct

3.

sulfide can form an isoulbe salt with any cation.

so option "e" is correct

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