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. | |
Atomic massthe average mass of an atom of an element compared with carbon-12. | |
Atomic numberthe number of protons in the nucleus of an atom. | |
Atomic radiusA measure of the size of an atom. | |
B
Bohr diagramA simplified representation showing electrons arranged in shells around a nucleus. | |
BrittleLikely to break or shatter rather than bend. | |
C
CationA positively charged ion. | |
Classificationarranging objects into groups based on shared characteristics. | |
ConductorA material that allows thermal energy or electricity to pass through easily. | |
Chemical propertyA characteristic describing how a substance behaves during chemical reactions. | |