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Chemsitry Essential

Chemistry Essential Vocabulary

QuestionAnswer
Conductivity Property of metal and alloys that allow heat or electricity charges to pass through the material easily.
Elements A substance that cannot be broken down into simpler substances by ordinary chemical means.
Metals An element below and to the left of the stair-step line of metalloids; about 80% of the known elements are metals.
Model A standard or example used for comparison.
Atom The smallest unit of matter that retain the identity of the substance.
Compounds a pure substance that is made up of more than one type of atom
Crystal Pattern A solid in which all the atoms are arranged in a regular, repeating pattern.
Evaporation Process in which liquid water changes to water vapor.
Filtering A porous material through which a substance is passed in order to separate the fluid from suspended particulate matter.
Heterogeneous A mixture that is not mixed evenly and each component retains its own properties
Homogenous Solid, liquid or gas that contains two or more substances blended evenly throughout.
Matter anything that has mass and volume
Mixtures The physical combination of 2 or more substances; can be separated by physical means.
Molecule the smallest physical unit of a substance that can exist independently, consisting of one or more atoms held together by chemical forces
Sifting To separate and retain the coarse parts to remove lumps and large particles
Conductivity Property of metal and alloys that allow heat or electricity charges to pass through the material easily.
Elements A substance that cannot be broken down into simpler substances by ordinary chemical means.
Periodic Table An arrangement of elements in order of increasing atomic numbers that demonstrates the periodic patterns that occur among the elements.
Physical Properties A characteristic of a substance that can be observed without changing the identity of the substance
Reactivity The ability of an atom or molecule to undergo a chemical reaction with another atom, molecule or compound.
Reactants the starting materials in a reaction
Chemical bond the "glue" that attracts and keeps atoms held together due to sharing of each atom's electrons
Chemical change the process in which one or more substances are changed into one or more new substances
Chemical property property that can be observed only when a substance is changed into a new substance
Chemical reaction the process in which one or more substances are changed into one or more new substances
Matter anything that has mass and volume
Phase any of the forms or states (solid, liquid, gas, or plasma) in which matter can exist
Physical Change change that does not alter the identity of a substance
Precipitate the solid that is formed as a result of a precipitation reaction
Closed System the reactants and products in the reaction that are contained to reduce error
Law of Conservation of Mass states that the total amount of mass and energy in the universe is conserved (does not change)
Mass a measure of the amount of matter in an object
Products materials present at the end of a reaction
Reactants the starting materials in a reaction
Periods The horizontal rows on the periodic table. Atomic Mass increases from left to right and top to bottom of the table.
Groups or Family Elements in the same column have similar properties. The elements in the group on the far left of the chart are the Alkali metals and are the most reactive elements.The vertical columns on the periodic table.
proton positive particals in the nucleus
Created by: dsf