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BIOL2117 CH. 2 STUDY GUIDE

Across
A MOLECULE THAT CONTAINS TWO OR MORE KINDS OF ATOMS.
THE TOTAL NUMBER OF PROTONS AND NEUTRONS IN AN ATOM.
OF AN ELEMENT ARE ATOMS WITH DIFFERENT NUMBERS OF NEUTRONS.
POSITIVELY CHARGED PARTICLES.
MOLECULES HOLD TOGETHER BECAUSE THE VALENCE ELECTRONS OF THE COMBINING ATOMS FORM ATTRACTIVE FORCES BETWEEN THE ATOMIC NUCLEI. 3 CHEMICAL BONDS ARE IONIC, COVALENT, AND HYDROGEN.
FORMS WHEN ATOMS COMBINE.
Down
THE SMALLEST COMPONENT OF A SUBSTANCE, AND IT CANNOT BE SUBDIVIDED INTO SMALLER SUBSTANCES WITHOUT LOSING ITS PROPERTIES.
UNCHARGED PARTICLES.
NUMBER OF PROTONS IN THE NUCLEUS.
ARE ATTRATIONS BETWEEN IONS OF OPPOSITE CHARGE, ONE ATOM LOSES ELECTRONS, AND ANOTHER GAINS ELECTRONS.
THE SCIENCE OF THE INTERACTION BETWEEN ATOMS AND MOLECULES.
NEGATIVELY CHARGED PARTICLES.
PROTONS AND ELECTRONS MAKE UP THE NUCLEUS, ELECTRONS MOVE AROUND THE NUCLEUS, HAS A NET POSITIVE CHARGE.
THE NUMBER OF MISSING OR EXTRA ELECTRONS IN THE OUTERMOST SHELL.
ATOMS WITH THE SAME NUMBER OF PROTONS ARE CLASSIFIED AND BEHAVE THE SAME WAY.