Which of the following is the electron configuration of an electrically neutral atom of argon (ar)? (a) 1s² 2s² 2p5 (b) 1s² 3d¹⁰ 4f⁷ (c) 1s² 2s² 2p⁶ 3s² 3s⁶ (d) 1s² 2s1

i can ! i just need to know what the paragraph is! : p

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.