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Science Ch 3 Vocab
Question | Answer |
---|---|
Chemical bonds | links between two or more atoms that hold the atoms together. |
Chemical formula | symbols that show the elements in a compound and their ratios |
Chemical name | the name of a compound that indicates the elements in it. |
Covalent compounds | compounds, such as water, in which two atoms share a pair of electrons. |
endothermic | characterized by an overall absorption of energy. |
exothermic | characterized by a release of heat, light, and sound through electrical or other means. |
ionic compounds | compounds, such as table salt, in which oppositely charged ions come together because of mutual attraction. |
ionic lattice | repeating pattern of positive and negative ions forming an ionic compound. |
Molecule | A group of atoms in which the atoms are bound together by the sharing of one bone or more pairs of electrons. |
multivalent metals | metals that can form an ion in more than one way, resulting in ions with different charges. The prefix “multi-” means many. |
Polyatomic ion | a molecular ion composed of more than one type of atom joined by covalent bonds. The prefix “poly-” means many. |
products | new substances formed in a chemical reaction. |
reactants | substances that react in a chemical reaction |
roman numerals | numerals based on those used by the ancient romans. |