Mendeleev arranged the elements by what physical property?
a. density
b. boiling point
c. atomic number
d. atomic mass report·fri

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

Is this correct if not can u correct me

Is it safe to take 450mg of diphenhydramine hydrochloride?