| A | B |
|---|
| ATOM | SMALLEST PARTICLE OF AN ELEMENT THAT RETAINS THE PROPERTIES OF THE ELEMENT |
| ATOMIC MASS | THE MASS OF AVOGADRO NUMBER OF FORMULA UNITS |
| ATOMIC NUMBER | NUMBER OF PROTONS IN AN ATOM OF AN ELEMENT |
| MASS NUMBER | NUMBER OF PROTONS PLUS NEUTRONS IN AN ATOM OF AN ELEMENT |
| MOLE | A GROUPING UNIT CONTAINING AVOGADRO'S NUMBER OF PARTICLES |
| AVOGADRO'S NUMBER | 6.02 x 10 23 |
| ELECTRON | NEGATIVELY CHARGE PARTICLE OF AN ATOM OUTSIDE THE NUCLEUS |
| ISOTOPES | ATOMS OF THE SAME ELEMENT WITH DIFFERENT NUMBER OF NEUTRONS IN THEIR NUCLEUS |
| WAVELENGHT | DISTANCE BETWEEN ANY TWO CONSECUTIVE POINTS ON A WAVE |
| CREST | TOP OF WAVE |
| TROUGH | BOTTOM OF WAVE |
| ENERGY LEVEL | AVERAGE DISTANCE FROM THE NUCLEUS THAT AN ELECTRON CAN BE LOCATED |
| GROUND STATE | LOWEST ENERGY STATE POSSIBLE FOR AN ELECTRON. CLOSEST ENERGY LEVEL AVALIABLE TO THE NUCLEUS |
| EXCITED STATE | ELECTRON ABSORBS ENERGY TO OCCUPY AN ENERGY LEVEL FURTHER FROM THE NUCLEUS |
| ELECTRON CONFIGURATION | SYMBOLIC REPRESENTATION OF THE ENERGY LEVELS AND SUBLEVELS EACH ELECTRON IN AN ATOM OCCUPIES |
| QUANTUM NUMBER | VARIABLES IN SCHRODINGER'S EQUATIONS THAT DESCRIBE THE PROBABLE LOCATION OF AN ELECTRON |
| SUBLEVEL | SHAPE OF PROBABILITY PATTERN |
| ORBITAL | REGION OF SPACE THAT IT IS MOST LIKELY TO FIND AN ELECTRON |
| PROTON | POSITIVELY CHARGED PARTICLE IN THE NUCLEOUS OF AN ATOM |
| NUCLEON | PARTICLES IN THE NUCLEOUS OF AN ATOM |
| HUND'S RULE | ELECTRONS FILLING DEGENERATE (ORBITALS IN SAME ENERGY LEVEL AND SUBLEVEL) WILL REMAIN UNPAIRED BEFORE THEY PAIR |
| PAULI'S EXCLUSION PRINCIPLE | NO TWO ELECTRONS IN THE SAME ATOM WILL HAVE THE SAME SET OF QUANTUM NUMBERS |
| SCHRODINGER | QUANTUM THEORY |
| BOHR | ENERGY LEVELS |
| RUTHERFORD | NUCLEOUS- ATOM MOSTLY SPACE |
| THOMSON | ELECTRON AND PLUM PUDDING MODEL OF THE ATOM |
