use the periodic table to select the element ...

# Brief Explanations: - For the first question, boron is a metalloid which has properties of both metals and non - metals. Zinc, aluminum, and copper are metals. - For the second question, among oxygen, hydrogen, chlorine, and neon, chlorine is highly reactive as it is a halogen and has a strong tendency to gain an electron to achieve a stable electron configuration. Neon is a noble gas and is very unreactive. Oxygen and hydrogen are reactive but less so than chlorine in this context. # Answer: - Which element below has properties of both metals and nonmetals? D. boron - Which element below is the most reactive? C. chlorine