Tooth fillings are often made of gold or porcelain because these materials are
a.
explosive
c.
visually pleasing
b.
nonreactive
d.
chemically similar to teeth
select the best answer from the choices provided

Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal

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.

What diagram shows the ionic compound of magnesium oxide