CHEM CHAPTA UNO
Terms
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- atom
- smallest part of an element that has all the characteristics of that element
- change of state
- PHYSICAL change of a substance form one state to another
- mixture
- blend of two or more kinds of matter, each of which contain its own properties
- chemical property
- the ability to undergo changes and form new substances
- chemical reaction/chemical change
- a change when one or more substances are converted into different substances
- compound
- two or more elements chemically combined in a definite ratio
- element
- simplest form of matter; pure substance, cannot be broken down by ordinary chemical means;
- extensive property
- depends on amount of substane present (vloume, mass, amount of enerygy)
- gas
- neither definite volume nor definite shape
- homogeneous mixture
- the same throughtout
- heterogeneous mixture
- not uniform throughtout, mas many layers or boundaries
- intensive property
- does not depend on amount of substance (boiling point, density and ability to conduct energy and heat)
- liquid
- particles are not as close as in a solid and not as far apart as those in a gas; definite volume, but not definite shape- takes shape of container
- mass
- the measure of the amount of matter
- matter
- anything that has mass and takes up space
- physical change
- does not change the composition (identity) of the substance (cutting, grinding)
- physical property
- observed or measured without changing that substance
- plasma
- fourth state of matter in which aatoms lose their electrons
- product
- result of chemical reaction
- pure substance
- substance with a fixed composition
- reactant
- substances that rect to form a new substance
- solid
- particles packd tightly, definite volume and definite shape
- solution
- homogeneous mixture
- chemical
- any substance that has definite composition
- chemistry
- the study of structure, properties, and composition of matter and the changes it undergoes
- family
- vertical columns on periodic table
- metal
- good conductors of heat and electricity, mostly solid, malleable and ductile, on left side of staircase
- metalloid
- semiconductor; intermediate roperties of metals and nonmetals, ALWAYS GASES, located on the staircase (except aluminum)
- nonmetal
- on righ side of staircase on periodic table; do not conduct heat and electricity well, mostly gas at room temperature
- period
- horizontal rows of the periodic table