Term | Definition |
acid | a substance that taste sour, reacts with metals and carbonates, and turns blue litmus paper red |
base | a substance that is bitter, feels slippery, and turns red litmus paper blue |
ph scale | the scale that measures how acidic or basic a substance is (1-2 meaning very acidid, 5-7 meaning neutral, 13-14 meaning very basic) |
subscript | the number in a chemical equation that tells how many atoms in a molecule or the ratio of elements in a compound |
coefficient | number in a chemical formula that tells how many molecules or atoms each reactant or product are involved in a reaction |
endothermic | when energy is taken in |
exothermic | when energy is given off |
ion | an atom or group of atoms that has become eletrically charged |
polar | an unequall share of electrons in a covalent bond |
non-polar | and equal share of electrons in a polar bond |
ductile | a metal being able to be pulled out in to a wire |
malleable | a metal being a able to be made into a sheet |
electrons/protons/neutrons | negatively charged particles in an atom, positively charged electrons in an atom, and neutrally charged particles in the necleus of an atom |
synthesis reaction | when elements combine to for a more complex element |
decomposition reaction | a chemical reaction in which compounds break down to form a simpler substance |
single replacement reaction | a reaction where one element replaces another element in a compound |