B:
Although there are almost 100 elements in nature, only six of them compose 99% of our body’s mass— carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus.
Answer:
4
Explanation:
the zeros after 102,4 are not significant.
Gas particles spread out to fill a container evenly, unlike solids and liquids. Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. Hence above statement is FALSE.
All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2.
