CHEM 121 FINAL EXAM! EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
❖ kinetic molecular theory - CORRECT-ANSWERS>>>>>all matter is made of tiny
particles that are constantly moving
❖ fundamental particle - CORRECT-ANSWERS>>>>>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 - CORRECT-ANSWERS>>>>>the fundamental particle of water is
what?
❖ atom - CORRECT-ANSWERS>>>>>the basic unit of a chemical element
❖ molecule - CORRECT-ANSWERS>>>>>two or more atoms (same or different)
chemically bound
❖ element - CORRECT-ANSWERS>>>>>fundamental particle contains only one kind
of atom
❖ compound - CORRECT-ANSWERS>>>>>two or more different kinds of atoms
chemically bound
, ❖ the same - CORRECT-ANSWERS>>>>>in a pure substance, all the fundamental
particles are what?
❖ solution - CORRECT-ANSWERS>>>>>mixture that is uniform throughout
❖ density - CORRECT-ANSWERS>>>>>= mass / volume
❖ atomic number - CORRECT-ANSWERS>>>>>number of protons in the nucleus,
defines the element
❖ mass number - CORRECT-ANSWERS>>>>>equal to the sum of protons and
neutrons
❖ isotope - CORRECT-ANSWERS>>>>>what results when you change the number of
neutrons in an element?
❖ atomic mass - CORRECT-ANSWERS>>>>>weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
❖ alkali metals - CORRECT-ANSWERS>>>>>group 1 on periodic table
❖ alkali earth - CORRECT-ANSWERS>>>>>group 2 on periodic table
❖ halogens - CORRECT-ANSWERS>>>>>group 17 on periodic table
❖ properties of metals - CORRECT-ANSWERS>>>>>good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in chemical
change
CORRECT QUESTIONS AND ANSWERS
2025
❖ kinetic molecular theory - CORRECT-ANSWERS>>>>>all matter is made of tiny
particles that are constantly moving
❖ fundamental particle - CORRECT-ANSWERS>>>>>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 - CORRECT-ANSWERS>>>>>the fundamental particle of water is
what?
❖ atom - CORRECT-ANSWERS>>>>>the basic unit of a chemical element
❖ molecule - CORRECT-ANSWERS>>>>>two or more atoms (same or different)
chemically bound
❖ element - CORRECT-ANSWERS>>>>>fundamental particle contains only one kind
of atom
❖ compound - CORRECT-ANSWERS>>>>>two or more different kinds of atoms
chemically bound
, ❖ the same - CORRECT-ANSWERS>>>>>in a pure substance, all the fundamental
particles are what?
❖ solution - CORRECT-ANSWERS>>>>>mixture that is uniform throughout
❖ density - CORRECT-ANSWERS>>>>>= mass / volume
❖ atomic number - CORRECT-ANSWERS>>>>>number of protons in the nucleus,
defines the element
❖ mass number - CORRECT-ANSWERS>>>>>equal to the sum of protons and
neutrons
❖ isotope - CORRECT-ANSWERS>>>>>what results when you change the number of
neutrons in an element?
❖ atomic mass - CORRECT-ANSWERS>>>>>weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
❖ alkali metals - CORRECT-ANSWERS>>>>>group 1 on periodic table
❖ alkali earth - CORRECT-ANSWERS>>>>>group 2 on periodic table
❖ halogens - CORRECT-ANSWERS>>>>>group 17 on periodic table
❖ properties of metals - CORRECT-ANSWERS>>>>>good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in chemical
change
