Listed below are sets of elements. Which period contains elements that have the following characteristics:

1) At least one is a metalloid.
2) At least one forms an ion with a charge of -2.
3) At least one is a gas.
4) At least one is a halogen

Answers-
-Oxygen, fluorine, and aluminum
-Silicon, magnesium, neon, iodine
-Arsenic, oxygen, neon, hydrogen
-Chlorine, sulfur, and silicon

Acovalent bond is formed between the two hydrogen bonds

What’s the solution?

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