CHEMISTRY 130 ARIZONA COLLEGE OF NURSING MIDTERM EXAM AND STUDY GUIDE EXAMS COMPLETE 150 QUESTIONS WITH DETAILED SOLUTIONS JUST RELEASED THIS YEAR

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CHEMISTRY 130 ARIZONA COLLEGE OF
NURSING MIDTERM EXAM AND STUDY GUIDE
EXAMS COMPLETE 150 QUESTIONS WITH
DETAILED SOLUTIONS JUST RELEASED THIS
YEAR

Chemistry 130 Arizona college of nursing midterm




Question: Significant figures - CORRECT ANSWER✔✔The numbers in a measurement that
represent the certainty of the measurement, plus one number representing an estimate.




Question: Density - CORRECT ANSWER✔✔The number given when the mass of a sample of a
substance is divided by the volume of the same sample.




Question: Molecular weight - CORRECT ANSWER✔✔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.




Question: Protons - CORRECT ANSWER✔✔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.




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Question: Neutrons - CORRECT ANSWER✔✔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.




Question: Electrons - CORRECT ANSWER✔✔a stable subatomic particle with a charge of
negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.




Question: Isotopes - CORRECT ANSWER✔✔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.




Question: Atom - CORRECT ANSWER✔✔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.




Question: Mass number of an atom - CORRECT ANSWER✔✔A number equal to the sum of the
number of protons and neutrons in the nucleus of an atom. Symbolically it is represented by.




Question: Mole - CORRECT ANSWER✔✔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.




Question: Period of the periodic table - CORRECT ANSWER✔✔A horizontal row of elements.




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Question: Group of the periodic table - CORRECT ANSWER✔✔A vertical column of elements
that have similar chemical properties; also called family of the periodic table.




Question: Metals - CORRECT ANSWER✔✔Elements found in the left two-thirds of the periodic
table. Most have the following properties: high thermal and electrical conductivities, high
malleability and ductility, and a metallic luster.




Question: Nonmetals - CORRECT ANSWER✔✔Elements found in the right one-third of the
periodic table. They often occur as brittle, powdery solids or gasses and have properties
generally opposite those of metals.




Question: Metalloids - CORRECT ANSWER✔✔Elements that form a narrow diagonal band in the
periodic table between metals and nonmetals. They have properties somewhat between those
of metals and nonmetals.




Question: Metallic property - CORRECT ANSWER✔✔Physical properties associated with metallic
character include metallic luster, shiny appearance, high density, high thermal conductivity, and
high electrical conductivity. Most metals are malleable and ductile and can be deformed
without breaking. Many metals are hard and dense.




Question: Atomic radii - CORRECT ANSWER✔✔is a measure of the size of its atom, usually the
mean or typical distance from the center of the nucleus to the outermost isolated electron.




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