click below
click below
Normal Size Small Size show me how
Science Def Ch 7
ATOMS AND MOLECULES
| Question | Answer |
|---|---|
| CHEMISTRY | THE STUDY OF MATTER |
| ATOM | THE SMALLEST PIECE OF AN ELEMENT |
| ELEMENT | A SUBSTANCE THAT CONTAINS ONLY ONE KIND OF ATOM |
| NUCLEUS | THE CENTER SECTION OF AN ATOM, MADE UP OF PROTONS |
| PROTON | A POSITIVELY CHARGED PARTICLE OF AN ATOM, IN THE NUCLEUS OF THE ATOM |
| NEUTRON | A PART OF THE NUCLEUS OF THE ATOM THAT HAS NO CHARGE |
| ATOMIC MASS | THE APPROXIMATE NUMBER OF PROTONS AND NEUTRONS IN AN ATOM |
| ELECTRON | A NEGATIVELY CHARGED PARTICLE OF AN ATOM WITH AN EXTREMELY SMALL MASS, TRAVELS AROUND THE NUCLEUS. |
| SHELL | AN AVERAGE DISTANCE AWAY FROM A NUCLEUS AT WHICH ELECTRONS CAN TRAVEL AROUND THE NUCLEUS ABLE TO HOLD A CERTAIN NUMBER OF ELECTRONS DEPENDING ON ITS DISTANCE FROM THE NUCLEUS |
| ATOMIC NUMBER | THE NUMBER OF PROTONS IN THE NUCLEUS OF THE ATOM |
| ATOMIC THEORY | WHAT SCIENTISTS THINK ABOUT ATOMS |
| PARTICLE ACCELERATOR | SPECIAL MACHINES SCIENTIST USE TO SMASH ATOMS |
| CHEMICAL SYMBOLS | ABBREVIATIONS FOR THE NAMES OF ELEMENTS |
| PERIOD | HORIZONTAL ROW OF THE PERIODIC TABLE |
| GROUP | VERTICAL COLUMN OF THE PERIODIC TABLE |
| CATAGORIES FAMILY) | CLASSIFICATION OF ELEMENTS BY SIMILIAR CHEMICAL PROPERTIES AND SIMILIAR REACTIONS TO OTHER ELEMENTS |
| PERIODIC TABLE OF ELEMENTS | GROUPING OF ELEMENTS INTO ROWS AND COLUMNS BASED UPON THEIR CHEMICAL AND PHYSICAL PROPERTIES |