11861400
Description
| Question | Answer |
| Valence Electrons | Outermost electrons |
| Octet Rule | Must have 8 electrons to be full |
| Compound | Combination of two or more elements |
| Why do elements form compounds? | They want to be stable |
| What are the three types of compounds? | Ionic, molecular/covalent, metallic |
| What are ionic compounds made of? | Metal and Nonmentals |
| What are covalent compounds made of? | Nonmetals only |
| What are metallic compounds made of? | Metals only |
| Are valence electrons available to be lost, shared or gained in a chemical bond? | All of the above |
| Why do atoms gain, lose, or share electrons (bond)? | So they can have a full octet. |
| What is an electric dot diagram? | An elements symbol with its valence electrons drawn around it in dots. |
| What is an ionic bond? | Bond in which one atom gains an electron and one loses an electron |
| How do elements achieve a full octet? | By transferring electrons |
| What do ions form? | Cations and Anions |
| What charge do cations have? | Positive charge (metals) |
| What charge do anions have? | Negative charge (nonmetals) |
| What is the total charge of a compound? | Zero |
| What (in the formula) tells you how many atoms of each element are present in the compound? | Subscript |
| Covalent | Sharing of electrons (tug of war) |
| Non-polar covalent | Electrons are shared equally |
| Polar covalent | Bonded atoms have an unequal attraction for the shared electrons, charge is not distributed equally. |
| Molecular formula | Shows how many atoms of each element a molecule contains |
| Diatomic molecule | Molecule consisting of two of the same atom |
| How many pairs of electrons can covalent bonds share? | Single, double, or triple |
| What are the properties of ionic compounds? | Hard, crystalline solids, brittle, water-soluble, high melting point, can conduct electricity |
| What are the properties of covalent/molecular compounds? | Soft, hard or flexible, usually less water-soluble, lower melting points, cannot conduct electricity. |
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