NLN Pax RN Basic Chemistry Exam
Review 2023 Update
A Grade
MATTER
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-a substance that has
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mass and occupies space.
SUBSTANCE
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-matter that has the
same composition and properties throughout
ELEMENT
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-any substance that
cannot be broken down into simpler substances. Identified by its symbol and its atomic
number.
ATOMIC NUMBER
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-is equal to the number
of protons found in the nucleus.
MASS NUMBER
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-number of protons and
neutrons (nucleons) in the nucleus of an atom
ISOTOPE
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-atoms of the same
element with the same atomic number but with different numbers of neutrons
ATOMIC MASS
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-The atomic mass may
be considered to be the total mass of protons, neutrons and electrons in a single atom.
ION
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-atom that has a positive
or negative charge
ATOM
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-smallest unit of an
element that still retains the properties of that element consists of thre subatomic
particles.
PROTON
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-a subatomic particle that
has a positive charge and that is found in the nucleus of an atom
CATION
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-a positively charged ion
ANION
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-a negatively charged ion
VALENCE ELECTRON
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-Electrons found on the
outer shell of an atom which can combine with other atoms to form molecules
PERIODIC TABLE
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-A table that shows the
elements, their atomic number, symbol, and average atomic mass; elements with
similar chemical properties are grouped together.
PERIOD
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-a horizontal row of
elements in the periodic table
GROUP
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-Vertical column of
elements in the periodic table, Contains elements with similar properties because of
their simlar electron configurations.
NEUTRON
Atomic Structure, Isotopes, Ions, and the Periodic Table - ANS-subatomic particle with
no charge and a mass about equal to a proton and found in the nucleus
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