Chemistry – 1 exam review with questions and answers (100% solved)
(chemistry) the mass (in atomic mass units) of an isotope of an element - ✔✔✔-Atomic Mass
(physical chemistry) a distinct state of matter in a system - ✔✔✔-phase
(physics and chemistry) the smallest component of an element having the chemical properties
of the element - ✔✔✔-atom
1) elements are composed of atoms. 2) atoms of same element are identical, but differ from
other elements. 3) elements can mix together 4) atoms only change when mixed with other
elements - ✔✔✔-Dalton's Atomic Theory
1/12 the mass of a carbon-12 atom - ✔✔✔-Atomic Mass Unit (amu)
a beam of electrons emitted by the cathode of an electrical discharge tube - ✔✔✔-Cathode Ray
a bond formed by sharing three pairs of electrons - ✔✔✔-triple covalent bond
a bond formed when atoms share one or more pairs of electrons - ✔✔✔-Covalent Bond
a bond that involves two shared pairs of electrons - ✔✔✔-double covalent bond
a change from one state (solid or liquid or gas) to another without a change in chemical
composition - ✔✔✔-Physical change
a change that produces matter with a different composition than the original matter - ✔✔✔-
chemical change
a chemical formula of a molecular compound - ✔✔✔-molecular formula
, Chemistry – 1 exam review with questions and answers (100% solved)
a chemical substance formed as a result of a chemical reaction - ✔✔✔-product
a chemical substance that is present at the start of a chemical reaction - ✔✔✔-reactant
a compound composed of molecules - ✔✔✔-molecular compound
a homogeneous mixture of two or more substances - ✔✔✔-solution
a horizontal row of elements in the periodic table - ✔✔✔-Period
a mixture in which the composition is not uniform throughout - ✔✔✔-heterogeneous mixture
a mixture in which the composition is uniform throughout - ✔✔✔-homogeneous mixture
a molecule consisting of two atoms - ✔✔✔-Diatomic Molecule
a molecule that has two poles - ✔✔✔-dipole
a negatively charged ion - ✔✔✔-Anion
a nonmetal in group 7A of the periodic table - ✔✔✔-Halogens
a one or two letter representation of an element - ✔✔✔-chemical symbol
a pair of valence electrons that is not shared between atoms - ✔✔✔-unshared pair
(chemistry) the mass (in atomic mass units) of an isotope of an element - ✔✔✔-Atomic Mass
(physical chemistry) a distinct state of matter in a system - ✔✔✔-phase
(physics and chemistry) the smallest component of an element having the chemical properties
of the element - ✔✔✔-atom
1) elements are composed of atoms. 2) atoms of same element are identical, but differ from
other elements. 3) elements can mix together 4) atoms only change when mixed with other
elements - ✔✔✔-Dalton's Atomic Theory
1/12 the mass of a carbon-12 atom - ✔✔✔-Atomic Mass Unit (amu)
a beam of electrons emitted by the cathode of an electrical discharge tube - ✔✔✔-Cathode Ray
a bond formed by sharing three pairs of electrons - ✔✔✔-triple covalent bond
a bond formed when atoms share one or more pairs of electrons - ✔✔✔-Covalent Bond
a bond that involves two shared pairs of electrons - ✔✔✔-double covalent bond
a change from one state (solid or liquid or gas) to another without a change in chemical
composition - ✔✔✔-Physical change
a change that produces matter with a different composition than the original matter - ✔✔✔-
chemical change
a chemical formula of a molecular compound - ✔✔✔-molecular formula
, Chemistry – 1 exam review with questions and answers (100% solved)
a chemical substance formed as a result of a chemical reaction - ✔✔✔-product
a chemical substance that is present at the start of a chemical reaction - ✔✔✔-reactant
a compound composed of molecules - ✔✔✔-molecular compound
a homogeneous mixture of two or more substances - ✔✔✔-solution
a horizontal row of elements in the periodic table - ✔✔✔-Period
a mixture in which the composition is not uniform throughout - ✔✔✔-heterogeneous mixture
a mixture in which the composition is uniform throughout - ✔✔✔-homogeneous mixture
a molecule consisting of two atoms - ✔✔✔-Diatomic Molecule
a molecule that has two poles - ✔✔✔-dipole
a negatively charged ion - ✔✔✔-Anion
a nonmetal in group 7A of the periodic table - ✔✔✔-Halogens
a one or two letter representation of an element - ✔✔✔-chemical symbol
a pair of valence electrons that is not shared between atoms - ✔✔✔-unshared pair
