What kind of bonds will be formed between the element with the electronic structure (a) 1s22s22p5 and the element with the electronic structure 1s22s1; (b) between the element with the electronic structure 1s22s22p2 and the element with the electronic structure 1s1; (c) between two atoms with the electronic structure 1s22s22p6 ? In each case, briefly explain.

Explanation is in the file

tinyurl.com/wtjfavyw

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.