Ais a group of atoms that behave like they are one ion

Definition of atomic group. Certain atoms form especially tightly bonded atomic groups. In minerals, these usually consist of an atom covalently bonded to three or four surrounding oxygen atoms. These groups usually have a net negative charge, in which case they are called anionic groups.

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sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.