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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 |