Intro to Chemistry Exam 1-Graded A
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
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
Name the Nine(9) Element Groups - correct answer-1. Alkali Metals
2. Alkaline Earth Metals
3. Transition Metals
4. 'Other' Metals
5. Metalloids
6. Non-Metals
7. Halogens
8. Noble Gases
9. Rare Earth Elements
Name Four(4) Alkali Metals - correct answer-Lithium
Sodium
Potassium
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
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
Name the Nine(9) Element Groups - correct answer-1. Alkali Metals
2. Alkaline Earth Metals
3. Transition Metals
4. 'Other' Metals
5. Metalloids
6. Non-Metals
7. Halogens
8. Noble Gases
9. Rare Earth Elements
Name Four(4) Alkali Metals - correct answer-Lithium
Sodium
Potassium
