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Unit 4 VOCAB!

chemistry The synthysetic study of the natural world
chemical bond an attraction between atoms or molecules and allows the formation of chemical compounds, which contain two or more different atoms
chemical change A reaction that transforms (changes) a substance into a new substance or substances with different properties
chemical formula A combination of chemical symbols and numbers that indicates which elements and how many atoms of each element are present in a compound
chemical property A property or characteristic of a substance having to do with how the atoms and molecules that make up the substance can be combined with or rearranged into other substances
compound A pure chemical substance consisting of two or more different different chemical elements that can be separated into other substances by chemical reactions
covalent bond A type of chemical bond in which atoms are held together in a molecule by sharing one or more electrons in their outer shells
endothermic reaction Pertaining to a chemical change that is due to the absorption of heat
exothermic reaction Pertaining to a chemical change that has to do with the release of heat
ion An atom or molecule in which the total number of electrons is not equal to the total number of protons
ionic bond A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion
periodic Happening or recurring at regular intervals; having repeated cycles
precipitate The formation of a solid
valence electrons An electron in the outer shell of an atom which can combine with other atoms to form molecules
Created by: owlgirl