Chemistry 130 Arizona college of nursing midterm Exam | Questions & Answers (100
%Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With
Expert Solutions
Matter - Anything that has mass and occupies space.
Mass - A measurement of the amount of matter in an object.
Weight - A measurement of the gravitational force acting on an object.
Physical changes - Changes matter undergoes without changing composition.
Physical properties - Properties of matter that can be observed or measured without trying to change
the composition of the matter being studied.
Chemical changes - Changes matter undergoes that involve changes in composition.
Chemical properties - Properties that matter demonstrates when attempts are made to change into new
substances.
Length - Meter
Volume - Liter
Mass - Grams
Scientific notation - A way of representing numbers consisting of a product between a nonexponential
number and raised to a whole-number exponent that may be positive or negative.
Significant figures - The numbers in a measurement that represent the certainty of the measurement,
plus one number representing an estimate.
, Density - The number given when the mass of a sample of a substance is divided by the volume of the
same sample.
Molecular weight - The relative mass of a molecule expressed in atomic mass units and calculated by
adding together the atomic weights of the atoms in the molecule.
Protons - a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal
in magnitude to that of an electron, but of opposite sign.
Neutrons - a subatomic particle of about the same mass as a proton but without an electric charge,
present in all atomic nuclei except those of ordinary hydrogen.
Electrons - a stable subatomic particle with a charge of negative electricity, found in all atoms and acting
as the primary carrier of electricity in solids.
Isotopes - Atoms that have the same atomic number but different mass numbers. That is, they are
atoms of the same element that contain different numbers of neutrons in their nuclei.
Atom - An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid,
gas, and plasma is composed of neutral or ionized atoms.
Mass number of an atom - A number equal to the sum of the number of protons and neutrons in the
nucleus of an atom. Symbolically it is represented by.
Mole - The number of particles (atoms or molecules) contained in a sample of an element or compound
with a mass in grams equal to the atomic or molecular weight, respectively. Numerically, mol is equal to
particles.
Period of the periodic table - A horizontal row of elements.
Group of the periodic table - A vertical column of elements that have similar chemical properties; also
called family of the periodic table.
%Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With
Expert Solutions
Matter - Anything that has mass and occupies space.
Mass - A measurement of the amount of matter in an object.
Weight - A measurement of the gravitational force acting on an object.
Physical changes - Changes matter undergoes without changing composition.
Physical properties - Properties of matter that can be observed or measured without trying to change
the composition of the matter being studied.
Chemical changes - Changes matter undergoes that involve changes in composition.
Chemical properties - Properties that matter demonstrates when attempts are made to change into new
substances.
Length - Meter
Volume - Liter
Mass - Grams
Scientific notation - A way of representing numbers consisting of a product between a nonexponential
number and raised to a whole-number exponent that may be positive or negative.
Significant figures - The numbers in a measurement that represent the certainty of the measurement,
plus one number representing an estimate.
, Density - The number given when the mass of a sample of a substance is divided by the volume of the
same sample.
Molecular weight - The relative mass of a molecule expressed in atomic mass units and calculated by
adding together the atomic weights of the atoms in the molecule.
Protons - a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal
in magnitude to that of an electron, but of opposite sign.
Neutrons - a subatomic particle of about the same mass as a proton but without an electric charge,
present in all atomic nuclei except those of ordinary hydrogen.
Electrons - a stable subatomic particle with a charge of negative electricity, found in all atoms and acting
as the primary carrier of electricity in solids.
Isotopes - Atoms that have the same atomic number but different mass numbers. That is, they are
atoms of the same element that contain different numbers of neutrons in their nuclei.
Atom - An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid,
gas, and plasma is composed of neutral or ionized atoms.
Mass number of an atom - A number equal to the sum of the number of protons and neutrons in the
nucleus of an atom. Symbolically it is represented by.
Mole - The number of particles (atoms or molecules) contained in a sample of an element or compound
with a mass in grams equal to the atomic or molecular weight, respectively. Numerically, mol is equal to
particles.
Period of the periodic table - A horizontal row of elements.
Group of the periodic table - A vertical column of elements that have similar chemical properties; also
called family of the periodic table.
