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Download • Bond: come together • Charge: there is either a positive or negative
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Bond: come together Charge: there is either a positive or negative charge Compound: two or more elements coming together. Electrons: negative charged Electron clouds: a visible model of the most likely locations for the electrons in an atom. Electron level: A quantum-mechanical concept for energy levels of electrons about the nucleus; electron energies are functions of each particular atomic species. Family: Fission: a nuclear reaction in which an atomic nucleus is split into two smaller parts. Formula Unit: the chemical formula with the least number of elements outof the set of empirical fo rmulas having the same proportion of ions as elements. Fusion: a nuclear reaction in which the nuclei of which atoms combine to form of two atoms combine to form a larger nucleus Group: a column of elements in a periodic table Half-Life: The time required for one half of a sample of radioactive isotope to decay Ion: an atom or a group of atoms that has a positive or negative charge Ionic Bond: The force that holds cautions and anions together Isotope: Atoms of a given element that have different numbers of neutrons and different mass number. Mass number: The sum of the number of protons and neutrons in the nucleus of an atom Metal: Elements that are good conductors of heat and electric current Molecule: A neutral group of atoms that is joined together by one or more covalent bond. Monomer: A small organic molecule that joins with other monomers to form a polymer Neutron: neutral charge Nucleus (nuclei): The dense, positively charged mass located in the center of an atom: Oxidation number Period: A row in a periodic table of elements the time required for one complete cycle of a periodic motion Periodic table: An arrangement of elements in columns based on a set of properties that repeat from row to row Polar: Pertaining to a compound exhibiting polarity or dipole moment, that is a compound bearing a partial positive charge on one side and a partial negative charge on the other.