Download atom a very small particle that makes up most kinds of matters and

atom
atom
atomic mass
a very small particle that makes
up most kinds of matters and
consists of smaller parts called
protons, neutrons and electrons.
the basic building block of
matter - the smallest particle of
an element that still has all the
properties of that element
a number equal to the sum of
the number of protons and
neutron in an atom’s nucleus
the number of protons in the
nucleus of an atom
atomic number
amu = atomic mass unit
A unit of mass equal to 1/12 the mass of
an atom of the most common isotope of
carbon (carbon 12), which is assigned a
mass of 12. A hydrogen atom has a mass
of 1 atomic mass unit since its mass is
1/12 the mass of carbon 12.
brittle
easily broken, cracked, or
snapped
example: brittle clay or brittle glass
buoyancy
the upward force that a fluid
exerts on an object that is less
dense than itself.
Example: buoyancy allows a boat to float on water
upward force exerted on an
object immersed in a fluid
buoyant force
an electrical property that can
be either positive or negative
charge
chemical equation
shorthand form for writing what
reactants are used and what
products are formed in a
chemical reaction; sometimes shows
whether energy is produced or absorbed.
chemical equation
chemical property
a description of a chemical
reaction written with chemical
formulas, subscripts and
coefficients
characteristic that can NOT be
observed without altering the
sample - it also determines how a
substance will react with another substance
chemical change
chemical formula
a change in which substances
become new substances with
different properties
a group of chemical symbols and
numbers that shows the kinds
and numbers of atoms in a
molecule
CH4
chemical reaction
a process in which elements and
compounds combine in new
ways to form new substances
chemical symbol
a code, normally composed of
one or two letters used to
represent an element
CH4
coefficient
compound
a number written before a chemical
formula to show how many atoms or
molecules of that substance are
involved in a reaction
a substance produced when
elements combine and whose
properties are different from
each of the elements in it
compound
a substance that forms when
two or more elements join
chemically
conduction
transfer of (heat) energy that
occurs when molecules bump
into each other
conductor
A material or an object that
conducts heat, electricity, light,
or sound.
Copper is a good conductor of
electricity.
mass of an object divided by its
volume
density
ductile
electron
electron cloud
Easily drawn out into a few
strand or wire. Gold and silver
are ductile metals.
negatively charged particle that
exists in an electron cloud
formation around an atom's
nucleus
region surrounding the nucleus
of an atom, where electrons are
most likely to be found
a property of matter; charge can
be positive or negative
electrical charge
substance that cannot be broken
down into simpler substances by
ordinary means - has unique
properties and is generally
classified as a metal, metalloid
or nonmetal
chemical reaction in which heat
energy is absorbed
element
endothermic reaction
chemical reaction in which heat
energy is released
exothermic reaction
a group or organisms ranking
above a genus and below an
order
family

easily set on fire
flammability
group
heat
ignitability, sustainability,
combustibility, and
consumability
a column in the periodic table
-family of elements in the
periodic table that have similar
physical or chemical properties
transfer of (heat) energy from one
object to another due to a difference in
temperature - flows from water objects
to cooler objects
a compound that does not
contain carbon
inorganic
unable to react chemically
inert
insulator
To cover or surround with a
material that prevents the loss
or transfer of heat, electricity, or
sound
a charged atom
ion
isotope
Law of conservation of mass
law of conservation of matter
two or more atoms of the same
element that have different
numbers of neutrons in the
nuclei (same number of protons)
states that mass is neither created nor
destroyed and as a result the mass of the
substances before a physical or chemical
change is equal to the mass of the substances
present after the change ---- the mass of the
products = the mass of the reactants
states that matter is not created
or destroyed it simply changes
form
the way a mineral reflects light
luster
having the properties of a
magnet; showing magnetism
magnetic
malleable
capable of being shaped or
formed in its solid state,
especially by pressure or
hammering
gold is the most malleable substance known
mass number = atomic mass
the sum of neutrons and
protons in the nucleus of an
atom
the amount of matter in an
object
mass
anything that takes up space and
has mass
matter
metal
metalloid
mixture
molecule
element that has luster, is
malleable and ductile and is a
good conductor of heat and
electricity
element that shares some
properties with metals and
nonmetals, it is a solid a room
temperature
a composition of two or more
substances that are not
chemically combined with each
other and are capable of being
separated
a group of two or more atoms
held together by very strong
chemical bonds, - the smallest unit
of a compound that has all the
properties of that compound
neutron
electrically neutral = no charge =
particle that has the same mass
as a proton and is found in an
atom's nucleus
nonmetal
element that is usually a gas or
brittle solid at room
temperature and is a poor
conductor of heat and
electricity, nonmetals are the
basic chemicals of life
positively charged central part of
an atom (contains both protons
and neutrons)
nucleus (atom)
organic
1. involving organisms or the
products of their life processes
2. relating to chemical compounds
containing carbon, especially
hydrocarbon
period
horizontal row of elements in
the periodic table whose properties
change gradually and predictably
physical property
physical change
characteristic that can be
observed, using the five senses,
without changing or trying to
change the composition of a
substance
change in which the form or
appearance of matter changes,
but not its composition/identity
product
substance that forms as a result
of a chemical reaction
proton
positively charged particle in the
nucleus of an atom and when
the number of protons are
counted it is used to identify the
element (atomic number)
a solid that forms during a
chemical reaction that takes
place in a solution
precipitate
properties
pure substance
Are the characteristics of a
substance
The way a substance tastes,
smells, color, etc.
a substance that has the same
chemical composition through
and cannot be separated into its
parts by physical means
H 2O
reactant
substance that exists before a
chemical reaction begins
reactivity
a chemical property that
describes how likely an element
is to form bonds with other
elements
The rate at which a chemical substance tends to
undergo a chemical reaction.
solubility
Capable of being dissolved
subatomic particle
subscript
sublimation
temperature
valence electron
one of the basic units of which atoms and all
matter are made -protons, neutrons and
electrons are subatomic particles
a number written to the right
and slightly below a chemical
symbol to identify how many
atoms of an element are in a
molecule
H2O
the process of changing from a
solid to a gas , or from a gas to a
solid, without passing through
an intermediate liquid phase
measure of the kinetic energy of
the atoms of an object
an electron in an atom's
outermost energy level
volume
the amount of space occupied
by three-dimensional object or
region of space
solid
one of the three basic forms of
matter composed of molecules
that have little or no ability to
exchange places
-fixed volume
liquid
one of the three basic forms of
matter, composed of molecules
that can move short distances
-no fixed shape, usually has volume
gas
one of the three basic forms of
matter, composed of molecules
in constant random motion
-no fixed shape, takes shape of space available