Sarah is ordering cheese pizza for a party of 10 people. she knows that each pizza has 8 slices. to figure out how many pizzas to order, sarah needs to know the

Number and variety of living organisms includes genetic, species, and ecological types

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.

Based on their relative positions in the periodic table, which two elements would have the same number of valence electrons?