Chemical Reactions and Conservation of Mass
Completion requirements
Pori drwy'r eirfa gan ddefnyddio'r mynegai hwn
Arbennig | A | B | C | CH | D | DD | E | F | FF | G | NG | H | I | L | LL | M | N | O | P | PH | R | RH | S | T | TH | U | W | Y | Y CYFAN
A
AtomThe smallest particle of an element that retains its chemical properties. | |
B
Balanced chemical equationA chemical equation with the same number of each type of atom on both sides. | |
C
Closed systemA system in which no matter can enter or leave. | |
CoefficientA number placed before a chemical formula indicating the number of particles involved in a reaction. | |
Conservation of massThe principle that mass is neither created nor destroyed during ordinary chemical reactions. | |
Chemical changeA change that produces one or more new substances. | |
Chemical equationA symbolic representation of a chemical reaction using chemical symbols and formulae. | |
Chemical formulaA combination of symbols and numbers showing the types and numbers of atoms in a substance. | |
Chemical reactionA process in which atoms are rearranged to form new substances. | |
Chemical symbolA one- or two-letter abbreviation representing an element. | |