CHEM 1030 ACS Final Exam with
Correct Answers 2026 Updated.
Proton - Answer A positively charged particle found in the nucleus of an atom
Neutron - Answer A small particle in the nucleus of the atom, with no electrical charge
Electrons - Answer negatively charged particles that orbit the nucleus in the atomic shells
atomic shells - Answer Energy levels of atoms from which electrons occupy. (Electron cloud)
atomic number - Answer the number of protons in the nucleus of an atom (Z)
periodic table - Answer an arrangement of elements in which the elements are separated
into groups based on a set of repeating properties
Nuclide - Answer general term for any isotope of any element
mass number (atomic mass) - Answer the sum of the number of neutrons (N) and protons
(Z) in an atomic nucleus
A Z X - Answer A = mass number
Z = atomic number
X = chemical symbol
Isotope - Answer Atoms of the same element that have different numbers of neutrons (mass
number)
What never changes in an atom - Answer number of protons
atomic mass - Answer The average mass of all the isotopes of an element (amu)
fractional abundance of an isotope - Answer fraction of the total number of atoms of an
element that is composed of a particular isotope
, average atomic mass - Answer the weighted average of the atomic masses of the naturally
occurring isotopes of an element
Periods - Answer Horizontal rows on the periodic table
groups/families - Answer Vertical columns on the periodic table
Metals - Answer good conductors of heat and electric current. Concentrated towards the left
side of the periodic table
Nonmetals - Answer Elements that are poor conductors of heat and electric current
Concentrated towards the right side of the periodic table
Metalloids - Answer elements with properties that fall between those of metals and
nonmetals. Located between metals and nonmetals
alkaline earth metals - Answer Group 2 on PT. Two valence electrons, form +2 ions. reactive
alkali metals - Answer Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low
density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium, 1 valence electron, +1 ion
noble gases - Answer the elements in Group 8A of the periodic table, colorless, odorless,
nonreactive
atomic radius - Answer one-half the distance between the nuclei of two atoms of the same
element when the atoms are joined
electron affinity trend - Answer Tendency of an atom to attract electrons
ionization energy - Answer the energy required to remove an electron from an atom in its
gaseous state
Electronegativity - Answer a measure of the tendency of an atom to attract a bonding pair of
electrons
Ion - Answer A charged atom
Correct Answers 2026 Updated.
Proton - Answer A positively charged particle found in the nucleus of an atom
Neutron - Answer A small particle in the nucleus of the atom, with no electrical charge
Electrons - Answer negatively charged particles that orbit the nucleus in the atomic shells
atomic shells - Answer Energy levels of atoms from which electrons occupy. (Electron cloud)
atomic number - Answer the number of protons in the nucleus of an atom (Z)
periodic table - Answer an arrangement of elements in which the elements are separated
into groups based on a set of repeating properties
Nuclide - Answer general term for any isotope of any element
mass number (atomic mass) - Answer the sum of the number of neutrons (N) and protons
(Z) in an atomic nucleus
A Z X - Answer A = mass number
Z = atomic number
X = chemical symbol
Isotope - Answer Atoms of the same element that have different numbers of neutrons (mass
number)
What never changes in an atom - Answer number of protons
atomic mass - Answer The average mass of all the isotopes of an element (amu)
fractional abundance of an isotope - Answer fraction of the total number of atoms of an
element that is composed of a particular isotope
, average atomic mass - Answer the weighted average of the atomic masses of the naturally
occurring isotopes of an element
Periods - Answer Horizontal rows on the periodic table
groups/families - Answer Vertical columns on the periodic table
Metals - Answer good conductors of heat and electric current. Concentrated towards the left
side of the periodic table
Nonmetals - Answer Elements that are poor conductors of heat and electric current
Concentrated towards the right side of the periodic table
Metalloids - Answer elements with properties that fall between those of metals and
nonmetals. Located between metals and nonmetals
alkaline earth metals - Answer Group 2 on PT. Two valence electrons, form +2 ions. reactive
alkali metals - Answer Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low
density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium, 1 valence electron, +1 ion
noble gases - Answer the elements in Group 8A of the periodic table, colorless, odorless,
nonreactive
atomic radius - Answer one-half the distance between the nuclei of two atoms of the same
element when the atoms are joined
electron affinity trend - Answer Tendency of an atom to attract electrons
ionization energy - Answer the energy required to remove an electron from an atom in its
gaseous state
Electronegativity - Answer a measure of the tendency of an atom to attract a bonding pair of
electrons
Ion - Answer A charged atom
