Elements and the Periodic Table
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
AnionA negatively charged ion formed when an atom gains electrons. | |
AtomThe smallest particle of an element that retains its chemical properties. | |
Atomic numberThe number of protons in the nucleus of an atom. | |