CHEM 121 EXAM 5 2026 COMPLETE QUESTIONS AND ANSWERS GRADED A.pdf

CHEM 121 EXAM 5 2026 COMPLETE
QUESTIONS AND ANSWERS GRADED A+ FULL
SOLUTION

◉ 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