Which of the following make an isoelectronic pair: cl –, o 2–, f, ca 2 , fe 3 ?.

Of the following elements, which is the least reactive? a. c b. h c. li d. he

Spaghetti sauce can be high in sodium. what is a good guideline for mg of sodium per half cup serving? a. less than 1 mg b. less than 800 mg c. less than 700 mg d. less than 400 mg

Draw each atom below as it looks like in nacl on the website.