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Science Chemistry

QuestionAnswer
Product the substance that forms after the reaction is complete
Reactant the substances that are present at the start of the reaction
Chemical reaction A change in which one or more reactants change into one or more products
Atomic number the number of protons in the nucleus of an atom of an element
Chemical Change observations Odour, Effervescence, colour change,Disappearance of a solid, burning, temperature change, precipitation,Formation of a solid deposit
Compound A substance made of atoms of different elements joined together by chemical bonds in a fixed ratio
Chemical change A change that produces matter with a different composition than the original matter
Physical change A change where some properties of a material change, but the composition of the material does not change
Molecule A group of non-metal atoms bonded together in a fixed ratio
Kinetic theory of Matter all matter is made up of tiny particles, which are in constant random motion
Atom The smallest particle of an element that retains its identity in a chemical reaction
Mixture Mixture is made up of two or more substances that are not chemically combined
Pure substance Is made up of a single type of element or compound
Temperature A measure of the average kinetic energy of particles in matte
Mass Number The total number of protons and neutrons in the nucleus of an atom
Element A substance which consists of only one type of atom
Created by: ChairLemurTable
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