Here are the answers to the questions based on your prompts:
Question 1
A) Why does the reactivity of metals increase from right to left on the periodic table?
Response: Metals on the right have more protons, causing valence electrons to be held more strongly.
Question 2
A) How do nonmetals tend to form bonds?
Response: by gaining electrons
Question 3
A) Which feature is unique to Group 18 nonmetals?
Response: They are very nonreactive.
Question 4
A) Which of the following combination of elements is the most reactive?
Response: Cs and I
Question 5
A) How does Rb bond with other elements?
Response: Rb loses an electron.
Feel free to ask further questions if you need more information!