Which statements accurately describe atoms?

The answers from the statements provided is that the atoms were named in the fifth century. The others are false. Atoms can be divided as such the last statement of atom being the smallest unit is also false, splitting of atoms generates huge amount of energy studied in nuclear physics or sciences. It also cannot be seen through standard microscope as light particle itself is made up of atoms. 

MARK ME BRAINIEST

positive reinforcement? ?

d. air pressure decreases as altitude increases.