Matter - ANSWER -a substance that has Cation - ANSWER -a positively charged ion
mass and occupies space.
Anion - ANSWER -a negatively charged ion
Substance - ANSWER -matter that has the
same composition and properties throughout
Valence Electron - ANSWER -Electrons
found on the outer shell of an atom which can
Element - ANSWER -any substance that combine with other atoms to form molecules
cannot be broken down into simpler substances.
Identified by its symbol and its atomic number.
Periodic Table - ANSWER -A table that
shows the elements, their atomic number,
Atomic Number - ANSWER -is equal to the symbol, and average atomic mass; elements with
number of protons found in the nucleus. similar chemical properties are grouped together.
Mass Number - ANSWER -number of Period - ANSWER -a horizontal row of
protons and neutrons (nucleons) in the nucleus elements in the periodic table
of an atom
Group - ANSWER -Vertical column of
Isotope - ANSWER -atoms of the same elements in the periodic table, Contains elements
element with the same atomic number but with with similar properties because of their simlar
different numbers of neutrons electron configurations.
Atomic Mass - ANSWER -the total of Neutron - ANSWER -subatomic particle
protons, neutrons and electrons in a single atom. with no charge and a mass about equal to a
proton and found in the nucleus
Ion - ANSWER -atom that has a positive or
negative charge Electron - ANSWER -negatively charged
particle and are found outside the nucleus and
arranged according to their energy level
Atom - ANSWER -smallest unit of an
element that still retains the properties of that
element consists of thre subatomic particles. Metal - ANSWER -a chemical element that
is a good conductor of both electricity and heat
and forms cations and ionic bonds with non-
Proton - ANSWER -a subatomic particle metals.
that has a positive charge and that is found in the Found on the left side of the periodic table.
nucleus of an atom ex. gold
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Metalloid - ANSWER -an element that has
some of the characteristics of metals and some
characteristics of nonmetals, and are Compound - ANSWER -is a substance of
semiconductors, located in between the groups two or more different atoms bonded together,
of metals and non-metals on the periodic table. which can be broken down into elements.
ex. arsenic
Gas - ANSWER -A state of matter with no
Nonmetal - ANSWER --an element that is a definite shape or volume. Attractions between the
poor conductor of heat and electricity atoms or molecules are weak, and the particles
-poor conductors of heat and electricity when move around in a random and erratic manner.
compared to metals
-usually have lower densities than metals
non-metals have high electronegativity Liquid - ANSWER -A state of matter where
ex. phosphorus there is no definite shape, and does not vary in
volume.
Noble Gases - ANSWER -Have full valence
shells and are inert. The last group on the right of Solid - ANSWER -a form of matter that has
the periodic table. a definite shape and volume, and its particles
have very little movement.
Radio-Isotopes - ANSWER -An isotope that
has an unstable nucleus and undergoes Melting - ANSWER -the process where heat
radioactive decay changes something from a solid to a liquid
Octet Rule - ANSWER -States that atoms EvaporatIon - ANSWER -the process by
lose, gain or share electrons in order to acquire a which a liquid turns into a gas.
full set of eight valence electrons
Vapor Pressure - ANSWER -a measure of
Ionic Bond - ANSWER -a chemical bond in the force exerted by a gas above a liquid in a
which one atom loses an electron to form a sealed container, which is specific for each liquid
positive ion and the other atom gains to electron and at each temperature.
to form a negative ion
Condensation - ANSWER -change of
Covalent Bond - ANSWER -a chemical matter from a gas to a liquid state
bond that involves sharing a pair of electrons
between atoms in a molecule
Freezing - ANSWER -the withdrawal of heat
to change something from a liquid to a solid
Element - ANSWER -any substance that
cannot be broken down into simpler substances
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