Acertain atom has an atomic number of four. how many protons does it have?

8 Protons

Explanation:

I think because consider the element helium. Its atomic number is 4, so it has four protons in its nucleus. Its nucleus also contains four neutrons. Since 4+4=8,the mass number of the helium atom is 8.

answer: if she breaths she a thho

explanation:

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.