An atom contains on proton, one electron, and one neutron. which two particles are most similar in mass

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude