A hydrogen atom is made of one proton and one electron. Electrons orbit the nucleus in A squares.
B energy levels.
C Bohr dot models.
D atomic structures.

B i think i hope this helps

Explanation:

the only liquid elements at standard temperature and pressure are bromine (br) and mercury (hg). although, elements caesium (cs), rubidium (rb), francium (fr) and gallium (ga) become liquid at or just above room temperature.

explanation:

let that person have a turn to speak : )