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matter final exam
matter final exam
33
Science
7th Grade
06/03/2012

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Term
an interaction that holds atoms or ions together
Definition
chemical bonds
Term
the number of protons in the nucleus of an atom
Definition
atomic number
Term
the temperature at which a substance changes form a liquid to a gas
Definition
boiling point
Term
an abbreviation of the name of an element
Definition
element symbol
Term
the ability of a substance to be able to burn
Definition
flammability
Term
a region around the nucleus of an atom where electrons are likely to be found
Definition
electron cloud
Term
an arrangement of the elements in order of their atomic number such as the element with similar properties fall in the same column or group
Definition
periodic table
Term
an element that is shiny and that conducts heat and electricity well
Definition
metal
Term
the law that during a chemical reaction matter is not created or destroyed. All atoms present at the start of the reaction are present at the end of the reaction.
Definition
conservation of mass
Term
an atoms central region which is made up of protons and neutrons
Definition
nucleus
Term
a characteristic of a substance that does not involve a chemical change such as density color or hardness
Definition
physical properties
Term
the sum of the numbers of protons and neutrons in the nucleus of an atom
Definition
mass number
Term
this family is known as a salt forming family
Definition

halogen family

 

Term
the measure of how well an electric current can move through a substance
Definition
electrical conductivity
Term
an electron that is found in the outermost shell of an atom and determines the atoms chemical properties
Definition
valance electron
Term
this family has all gases and has a full orbit/shell
Definition
noble gases
Term
the temperature at which a substance changes from a solid to a liquid
Definition
melting point
Term
a horizontal row of elements in the periodic table
Definition
family
Term
the ratio of the mass of a substance to the volume of a substance
Definition
density
Term
a subatomic particle that has a positive charge and that is located in the nucleus of an atom
Definition
proton
Term
the ability of a substance to interact with another substance and form one or more new substances
Definition
reactivity
Term
the measure of how well an electrical current can move through a substance
Definition
conductivity
Term
an element that conducts heat and electricity poorly
Definition
nonmetal
Term
a subatomic particle that has no charge and that is located in the nucleus of an atom
Definition
neutron
Term
this family is highly reactive as you move down the family
Definition
alkali metal
Term
an element that has properties of both metals and nonmetals
Definition
metalloid
Term
the ability of a substance to be drawn/pulled through wires
Definition
ductility
Term
the ability of one substance to dissolve into another substance at a given temperature and pressure
Definition
solubility
Term
a property of matter that describes a substances ability to participate in a chemical reaction
Definition
chemical property
Term
a subatomic particle that has a negative charge and is found in the electron cloud
Definition
electron
Term
the smallest unit of an element that maintains the properties of that element
Definition
atom
Term
a vertical column of elements in the periodic table; elements in a column share chemical and/or physical properties
Definition
family
Term
the ability of a substance to be rolled or pounded into various shapes
Definition
malleability
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