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Benchmark II Review7

TermDefinition
What has the smallest particle of matter that displays the properties of an element? an atom
What has a pure substance, made up of only 1 kind of atom - it cannot be broken down into simper substances by ordinary means? an element
What is the center of the atom which contains protons and etrons - has a positive change? nucleus
__________-the number of protons (electrons) in an atom - it is used to identify an element atomic number
__________-the mass of the nucleus - it is the number of protons plus the number of neutrons atomic mass
horizontal row of elements on the periodic table are called periods
vertical columns of elements on the periodic table are called groups
subatomic particle with positive charge proton
subatomic particle with negative charge electron
subatomic particle with no charge neutron
location of electrons electron cloud
the number of protons atomic number
the sum of protons and neutrons atomic mass number
are mostly solids, shiny, malleable and good conductors of heat and electricity metals
are mostly gases, dull, brittle and poor conductors of heat and electricity non-metals
have properties of metal and non-metals metalloids
arrangement of elements on current periodic table increasing atomic number
organism a living thing
cell the basic unit of living things that is self-sufficient
unicellular Made of a single cell
multi-cellular consisting of many cells
sensitivity responding to your environmental surroundings
autotrophs an organism that makes its own food (producer)
heterotrophs an organism that consumer energy from different sources (consumers)
homeostasis the maintenance of stable internal conditions in an organism.
growth the process of change that occurs during an organism's life to produce a more complex (mature) organism
ingestion the ability to take in substances within the environment for energy
movement (physical and chemical) physically moving from place to place (physical) or the ability to move substances from one part of the body to another (chemical)
respiration the ability to exchange gases with the environment
excretion the removal of waste from the body.
reproduction to produce more of your species
living things have cells and undergo life functions
nonliving things do NOT contain cells; went through a process that has altered them; do NOT perform life functions
dead once living and no longer able to perform life functions
natural resources found on Earth naturally; innately on Earth; water, sunlight
synthetic material most created from natural resources; materials are manufactured; glass, plastic
chemical reaction A process in which atoms of one or more substances rearrange to form one or more new substances.
chemical equation A description of a reaction using element symbols and chemical formulas.
reactants The starting substances produced by the chemical reaction.
products The substances produced by the chemical reaction.
law of conservation of mass States that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction.
coefficient A number placed in front of an element symbol or chemical formula in an equation.
endothermic reaction Chemical reactions that absorb thermal energy.
exothermic reaction Chemical reaction that releases thermal energy.
What happens during a chemical change? A NEW substance is produced with new properties.
what happens during a physical change? The original substance still exists but physically is changed in form or appearance.
Precipitate a solid formed from a liquid during a chemical reaction
Created by: lsabs
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