Find the element "oxygen." a, What does the "8" on top of the chemical symbol signify?

Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus

Explanation: I hope this helps

it signify O, which is oxgen.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;