CHEM 121 FINAL EXAM Questions and
Answers | 2026 Complete Exam Prep |
A+ Verified
• fundamental particle. CORRECT 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. CORRECT ANSWER: the fundamental particle of water is what?
• atom. CORRECT ANSWER: the basic unit of a chemical element
• molecule. CORRECT ANSWER: two or more atoms (same or different)
chemically bound
• element. CORRECT ANSWER: fundamental particle contains only one kind of
atom
• compound. CORRECT ANSWER: two or more different kinds of atoms
chemically bound
• the same. CORRECT ANSWER: in a pure substance, all the fundamental
particles are what?
• solution. CORRECT ANSWER: mixture that is uniform throughout
• density. CORRECT ANSWER: = mass / volume
, • atomic number. CORRECT ANSWER: number of protons in the nucleus, defines
the element
• mass number. CORRECT ANSWER: equal to the sum of protons and neutrons
• isotope. CORRECT ANSWER: what results when you change the number of
neutrons in an element?
• atomic mass. CORRECT ANSWER: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
• alkali metals. CORRECT ANSWER: group 1 on periodic table
• alkali earth. CORRECT ANSWER: group 2 on periodic table
• halogens. CORRECT ANSWER: group 17 on periodic table
• properties of metals. CORRECT ANSWER: good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in chemical
change
• properties of non metals. CORRECT ANSWER: poor conductors of heat and
electricity, not ductile, not malleable, gain electrons in chemical change
• avagadros number. CORRECT ANSWER: 6.022 x 10^23
Answers | 2026 Complete Exam Prep |
A+ Verified
• fundamental particle. CORRECT 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. CORRECT ANSWER: the fundamental particle of water is what?
• atom. CORRECT ANSWER: the basic unit of a chemical element
• molecule. CORRECT ANSWER: two or more atoms (same or different)
chemically bound
• element. CORRECT ANSWER: fundamental particle contains only one kind of
atom
• compound. CORRECT ANSWER: two or more different kinds of atoms
chemically bound
• the same. CORRECT ANSWER: in a pure substance, all the fundamental
particles are what?
• solution. CORRECT ANSWER: mixture that is uniform throughout
• density. CORRECT ANSWER: = mass / volume
, • atomic number. CORRECT ANSWER: number of protons in the nucleus, defines
the element
• mass number. CORRECT ANSWER: equal to the sum of protons and neutrons
• isotope. CORRECT ANSWER: what results when you change the number of
neutrons in an element?
• atomic mass. CORRECT ANSWER: weighted average of the masses of the
isotopes of an element, gives the mass of one atom of the element
• alkali metals. CORRECT ANSWER: group 1 on periodic table
• alkali earth. CORRECT ANSWER: group 2 on periodic table
• halogens. CORRECT ANSWER: group 17 on periodic table
• properties of metals. CORRECT ANSWER: good conductors of heat and
electricity, malleable, ductile, often shiny, tend to lose electrons in chemical
change
• properties of non metals. CORRECT ANSWER: poor conductors of heat and
electricity, not ductile, not malleable, gain electrons in chemical change
• avagadros number. CORRECT ANSWER: 6.022 x 10^23
