How many atoms of phosphorus are represented by one formula unit of calcium phosphate?

a. 3
b. 6
c. 9
d. 12
e. 18

Which feature do highland climates have that lower elevation areas do not?

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?