PLEASE ANSWER ASAP WILL MARK BRAINLIEST!!! The periodic table

a.) is arranged by atomic mass

b.) was developed by early alchemists

c.) is arranged by number of protons

d.) is divided into vertical periods and horizontal groups

D.

Explanation:

The periodic table is divided into vertical periods and horizontal groups

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

yes

explanation

they do and it slaps