Listed below are sets of elements. which group 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. a) oxygen, fluorine, and aluminum b) chlorine, sulfur, and silicon c) arsenic, oxygen, neon, hydrogen d) silicon, magnesium, neon, iodine

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.