CHEM 121 2026 CHEMICAL EQUILIBRIUM
STUDY COMPANION
◉fundamental particle. Answer: take a macroscopic object and
divide it repeatedly. Eventually you have a particle, which, if further
divided is no longer the original substance. This smallest piece of the
substance is called...
◉h2o molecule. Answer: the fundamental particle of water is what?
◉atom. Answer: the basic unit of a chemical element
◉molecule. Answer: two or more atoms (same or different)
chemically bound
◉element. Answer: fundamental particle contains only one kind of
atom
◉compound. Answer: two or more different kinds of atoms
chemically bound
, ◉the same. Answer: in a pure substance, all the fundamental
particles are what?
◉solution. Answer: mixture that is uniform throughout
◉density. Answer: = mass / volume
◉atomic number. Answer: number of protons in the nucleus, defines
the element
◉mass number. Answer: equal to the sum of protons and neutrons
◉isotope. Answer: what results when you change the number of
neutrons in an element?
◉atomic mass. Answer: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
◉alkali metals. Answer: group 1 on periodic table
◉alkali earth. Answer: group 2 on periodic table
◉halogens. Answer: group 17 on periodic table
STUDY COMPANION
◉fundamental particle. Answer: take a macroscopic object and
divide it repeatedly. Eventually you have a particle, which, if further
divided is no longer the original substance. This smallest piece of the
substance is called...
◉h2o molecule. Answer: the fundamental particle of water is what?
◉atom. Answer: the basic unit of a chemical element
◉molecule. Answer: two or more atoms (same or different)
chemically bound
◉element. Answer: fundamental particle contains only one kind of
atom
◉compound. Answer: two or more different kinds of atoms
chemically bound
, ◉the same. Answer: in a pure substance, all the fundamental
particles are what?
◉solution. Answer: mixture that is uniform throughout
◉density. Answer: = mass / volume
◉atomic number. Answer: number of protons in the nucleus, defines
the element
◉mass number. Answer: equal to the sum of protons and neutrons
◉isotope. Answer: what results when you change the number of
neutrons in an element?
◉atomic mass. Answer: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
◉alkali metals. Answer: group 1 on periodic table
◉alkali earth. Answer: group 2 on periodic table
◉halogens. Answer: group 17 on periodic table
