.I NEED HELP
are composed of two or more covalently bonded atoms.
a. Elements
b. Molecules
2.
A(n) is the basic building block of matter and is composed of protons, neutrons, and electrons.
a. Atom
b. Molecule
3.
can be both an atom and a molecule.
a. Hydrogen
b. Helium

option a and d is the correct answer

i hope this u

plz mark as the brainliest answer

true                                                                                                       true true true true true true

"it built up in the atmosphere"

i think thats it, idk, i tried looking for this exact q& a for grad. and idk if i got this question right or sorry if im wrong