(direct answer=upvote cause i aint smart xd)
which of these is a physical change?
a. iron rusts
b. gas is burned
c. paper is shredded
d. a shirt is bleached

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

At element makes up all organic compounds?