Intro to Chemistry Exam 1
What is Matter? - ✔✔ correct answer ______ is anything that occupies space and has mass.
What is Mass? - ✔✔ correct answer ____ is the amount of matter in an object; never changes
What is Weight? - ✔✔ correct answer _______ is the gravitational force exerted on an object; can
change
Define: Element - ✔✔ correct answer _______ is made up of molecules/atoms of the same kind;
cannot be chemically subdivided into simpler substances
Define: Compound - ✔✔ correct answer ________ is made up of molecules/atoms of two or more
kinds; can be chemically subdivided into simpler substances
Define: Atom - ✔✔ correct answer A/An ____ is the unit from which matter is made; limit of
chemical subdivision; smallest particle of an element; composed of protons, neutrons, and electrons
Define: Nucleus - ✔✔ correct answer The _______ is the central core of atoms that contains protons
and neutrons; has a positive(+) charge equal(=) to the number of protons
Define: Electrons - ✔✔ correct answer _________ move in a circular orbit around the positive(+)
nucleus
Define: Atomic Weight - ✔✔ correct answer ______ ______ is the relative weight of atoms in terms
of C12; the sum of protons and neutrons
Define: Gram Atomic Weight - ✔✔ correct answer ____ ______ ______ is the atomic weight
expressed in grams
Define: Molecule - ✔✔ correct answer A/An ________ is the smallest unit of a compound
Define: Molecular Weight - ✔✔ correct answer ________ ______ is the sum of the atomic weights of
all the atoms forming the molecule
, Intro to Chemistry Exam 1
Define: Gram Molecular Weight - ✔✔ correct answer The _________ ______ is the molecular weight
of a compound expressed in grams
Define: Electrolyte - ✔✔ correct answer A/An ___________ is a substance whose solution will
conduct an electric current
Define: Acid - ✔✔ correct answer ____ is a substance that yields hydrogen ions in solution
Define: Base - ✔✔ correct answer ____ is a substance that yields a hydroxyl (OH-) ion in solution;
substance that can accept a proton
Define: Salt - ✔✔ correct answer ____s are compounds formed by replacing the hydrogen of an acid
with a metal
Define: Radical / Polyatomic Groups - ✔✔ correct answer A _______ or __________ _____ is a group
of elements that behave like a single element
Define: Valence - ✔✔ correct answer _______ is the property of an element that determines the
number of hydrogen (H) atoms that its atom can combine with or displace
Define: Chemistry - ✔✔ correct answer _________ is the study of matter
Define: Trace Elements - ✔✔ correct answer _____ ________ are elements that are essential to the
body but are found in minute quantities
Define: Isotope - ✔✔ correct answer A/An _______ is a different form of the same element; same
atomic number but a different atomic weight
Define: Atomic Number - ✔✔ correct answer ______ ______ is the number of protons in the nucleus
Define: Radioisotope - ✔✔ correct answer A/An ____________ is an unstable isotope
Define: Periodic Table - ✔✔ correct answer The ________ _____ is the arrangement of the elements
in a table based on the periodic law
What is Matter? - ✔✔ correct answer ______ is anything that occupies space and has mass.
What is Mass? - ✔✔ correct answer ____ is the amount of matter in an object; never changes
What is Weight? - ✔✔ correct answer _______ is the gravitational force exerted on an object; can
change
Define: Element - ✔✔ correct answer _______ is made up of molecules/atoms of the same kind;
cannot be chemically subdivided into simpler substances
Define: Compound - ✔✔ correct answer ________ is made up of molecules/atoms of two or more
kinds; can be chemically subdivided into simpler substances
Define: Atom - ✔✔ correct answer A/An ____ is the unit from which matter is made; limit of
chemical subdivision; smallest particle of an element; composed of protons, neutrons, and electrons
Define: Nucleus - ✔✔ correct answer The _______ is the central core of atoms that contains protons
and neutrons; has a positive(+) charge equal(=) to the number of protons
Define: Electrons - ✔✔ correct answer _________ move in a circular orbit around the positive(+)
nucleus
Define: Atomic Weight - ✔✔ correct answer ______ ______ is the relative weight of atoms in terms
of C12; the sum of protons and neutrons
Define: Gram Atomic Weight - ✔✔ correct answer ____ ______ ______ is the atomic weight
expressed in grams
Define: Molecule - ✔✔ correct answer A/An ________ is the smallest unit of a compound
Define: Molecular Weight - ✔✔ correct answer ________ ______ is the sum of the atomic weights of
all the atoms forming the molecule
, Intro to Chemistry Exam 1
Define: Gram Molecular Weight - ✔✔ correct answer The _________ ______ is the molecular weight
of a compound expressed in grams
Define: Electrolyte - ✔✔ correct answer A/An ___________ is a substance whose solution will
conduct an electric current
Define: Acid - ✔✔ correct answer ____ is a substance that yields hydrogen ions in solution
Define: Base - ✔✔ correct answer ____ is a substance that yields a hydroxyl (OH-) ion in solution;
substance that can accept a proton
Define: Salt - ✔✔ correct answer ____s are compounds formed by replacing the hydrogen of an acid
with a metal
Define: Radical / Polyatomic Groups - ✔✔ correct answer A _______ or __________ _____ is a group
of elements that behave like a single element
Define: Valence - ✔✔ correct answer _______ is the property of an element that determines the
number of hydrogen (H) atoms that its atom can combine with or displace
Define: Chemistry - ✔✔ correct answer _________ is the study of matter
Define: Trace Elements - ✔✔ correct answer _____ ________ are elements that are essential to the
body but are found in minute quantities
Define: Isotope - ✔✔ correct answer A/An _______ is a different form of the same element; same
atomic number but a different atomic weight
Define: Atomic Number - ✔✔ correct answer ______ ______ is the number of protons in the nucleus
Define: Radioisotope - ✔✔ correct answer A/An ____________ is an unstable isotope
Define: Periodic Table - ✔✔ correct answer The ________ _____ is the arrangement of the elements
in a table based on the periodic law
