In what way are elements in the same column of the periodic table the same? Select all that apply.     

The number of ______ is the same for all atoms of the same element.

Which substances are on the basic side of the pH scale? Select all that apply.

Amino acids are acids because they always possess the functional group known as _______________.

The reactivity of an organic molecule is primarily dependent upon _____ of the molecule.

An atom that is made up of 8 protons, 8 neutrons and 8 electrons would have a mass of _____ daltons.

Match the following pairs of atoms with the statement that correctly describes both atoms in the pair:

In an ethane molecule (C2H6), each carbon atom binds to _______ hydrogen atoms.

The following elements make up >95% of living matter except:  

Which of the following statements are true about buffer solutions? Select all that apply.