click below
click below
Normal Size Small Size show me how
Bonds Study Guide
| Question | Answer |
|---|---|
| Ion - | an atom or molecule with a net electric charge due to the loss or gain of one or more electrons. |
| What happens to an ion if it loses or gains and electron | loses - becomes a positive ion gains - becomes a negative ion |
| Ionic bond - | an attraction between negative and positively charged ions |
| Polyatomic ion - | A polyatomic ion is an ion made of two or more atoms to create a polyatomic ion |
| What comes first when writing ionic formulas | metals |
| What happens to the ending of ionic compounds | add -ide |
| How do you create a ionic compound formula given oxidation numbers | Calcium chloride - Ca+2 Cl -1 it takes two calciums to match chloride |
| Identify the properties of ionic compounds | - high melting points - when dissolved in water can conduct electricity - hard, brittle, crystals - as a solid in room temperature ions do not conduct electricity well |
| Covalent bond - | Bond made between at least 2 Non-metal atoms, that share electrons |
| What's the main difference between ionic and covalent bonds | An ionic bond essentially donates an electron to the other atom participating in the bond, while electrons in a covalent bond are shared equally between the atoms. The only pure covalent bonds occur between identical atoms |
| What do covalent bonds usually form as | 2 non-metals |
| What atoms stay attracted to each other | covalent |
| What are the properties of molecular compounds | - low melting and boiling points - do not usually conduct electricity when dissolved in water |
| What's the difference between polar and nonpolar bonds | polar - bond where electrons are unequally shared nonpolar - bond where electrons are equally shared |
| How come some atoms in covalent bonds become slightly negative or slightly positive. | when they pull more or less strongly on shared electrons |
| How are metal atoms bonded in solid metal | most metals have 1, 2, or 3 valence electrons |