Electrons and protons (attract/repel) each other. As an electron gets closer to the nucleus the (attraction/repulsion) to the nucleus gets (stronger/weaker).

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Answer explain why it is not possible to deduce a complete order of reactivity.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.