The nonmetals helium, neon, and argon and the metals copper, silver, and gold are among only a few elements that are found in nature in their pure forms.

What can you infer about the
chemical reactivity of these elements?

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.