The 50 words you need to know!
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| absolute zero | lowest possible temperature; temperature at which particles of matter almost stop moving
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| acid | substance that reacts with metals to release hydrogen
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| alloy | substance made of a mixture of two or more metals
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| atom | smallest part of an element that can be identified as that element
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| atomic mass | total mass of the protons and neutrons in an atom
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| atomic number | number of protons in the nucleus of an atom
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| base | substance formed when metals react with water
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| chemical change | change that produces new substances
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| chemical equation | statement in which chemical formulas are used to describe a chemical reaction
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| chemical formula | way of writing the name of a compound using chemical symbols
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| chemical reaction | process in which new substances with new chemical and physical properties are formed
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| chemical symbols | shorthand way of writing the names of the elements
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| chemistry | study of matter and its reactions
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| coefficient | number that shows how many molecules of a substance are involved in a chemical reaction
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| compound | substance made up of two or more elements chemically combined
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| covalent bond | bond formed when atoms share electrons
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| density | mass per unit volume
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| electron | atomic particle with a negative electric charge
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| elements | simple substances that cannot be broken down into simpler substances
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| family (group) | vertical column of elements in the periodic table
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| indicator | substance that changes color in acids and bases
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| insoluble | not able to dissolve
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| ion | an atom with an electrical charge
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| ionic bond | bond formed between atoms that have gained and lost electrons
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| isotope | atom of an element with the same number of protons but a different number of neutrons
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| mass | amount of matter in an object
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| matter | anything that has mass and takes up space
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| metals | elements that have the properties of luster, ductility, and malleability
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| mixture | two or more substances that have been mixed together but not chemically combined
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| molecule | smallest part of a substance that has all the properties of that substance
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| neutral | neither acidic or basic
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| neutron | atomic particle with neither a negative nor a positive electric charge
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| nonmetals | elements that have none of the properties of metals
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| nucleus | center, or core, of an atom
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| organic compound | compound containing carbon
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| oxidation | chemical reaction in which electrons are lost
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| oxidation number | number of electrons an atom gains, loses, or shares when it forms a chemical bond
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| period | horizontal row of elements in the periodic table
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| periodic | repeating pattern
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| pH scale | measure of the concentration of hydrogen ions or hydroxyl ions in a solution
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| physical change | change that does not produce new substances
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| product | substance that is formed in a chemical reaction
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| proton | atomic particle with a positive electric charge
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| reactant | substance that is changed in a chemical reaction
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| soluble | able to dissolve
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| solute | substance that is dissolved
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| solution | mixture in which one substance is evenly mixed with another substance
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| solvent | substance in which a solute dissolves
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| subscript | number written to the lower right of a chemical symbol
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| valence electrons | electrons in an atom's outer energy level
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Created by:
Ms Potts
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