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BC Science 9 Ch3
BC Science 9 Chapter 3
Question | Answer |
---|---|
Chemical bonds | Links between two or more atoms that hold the atoms together. |
Covalent compounds | Atoms combine by sharing electrons to form molecules. |
Ionic compounds | Atoms combine by transferring electrons to form molecules. |
Ionic lattice | A repeating pattern of positive and negative ions. |
Polyatomic ion | Covalent compounds that gain or lose electrons. |
Chemical name | Indicates the elements present in a compound. |
Chemical formula | Shows the symbols and relative numbers of ions in a compound. |
Multivalent metals | Can form two or more different positive ions. |
Reactants | Substances going into a reaction. |
Products | New substance formed after a reaction. |
Exothermic reaction | Reaction that releases energy. |
Endothermic reaction | Reaction that absorbs energy. |