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ChemistryTA11
Chemistry Sem. 2 final
| Question | Answer |
|---|---|
| Ionic Compound | compound composed of negative and positive ions |
| ionic bond | electrostatic attraction that binds oppositely charged ions together |
| polyatomic ion | tightly bonded group of atoms that behaves as a unit and has a positive or negative charge |
| polar molecule | one side of the molecule is slightly negative and one side is slight positive |
| double covalent bond | a bond in which two atoms share two pairs of electrons |
| electron dot structure (Lewis dot structure) | notation that depicts valence electrons as dots around the atomic symbol of the element; symbol represents inner electrons and atomic nucleus |
| hydrogen bond | attractive forces in which a H covalently bonded to a very electronegative atom is also weakly bonded to an unshared e- pair of another electronegative atom |
| resonance structure | 1 of 2 or more equally valid e- dot structures of a molecule or a polyatomic atom |
| triple covalent bond | 3 pairs of e- are shared by 2 atoms |
| lone pair (unshared pair) | pair of valence e- that isn't shared between atoms |
| VESPR | valence shell electron pair repulsion; because e- pairs repel, molecules adjust to their shapes so that valence e- pairs are as far apart as possible |
| structural formuala | chemical formula that shows the arrangement of atoms in a molecule or a polyatomic ions |
| polar covalent bond | covalent bond between atoms in which e- are shared unequally |
| metallic bond | force of attraction that holds metals together |
| molecule (molecular compound) | neutral group of atoms joined by covalent bonds |
| chemical formula | expression that indicates the number and type of atoms present in the smallest representative unit of a substance |
| coordinate covalent bond | one atom contributes both bonding electrons |
| non-polar covalent bonds | e- are shared equally by the 2 atoms |
| single covalent bond | formed when 2 atoms share a pair of electrons |
| molecular formula | chemical formula of a molecular compound that shows the kinds and numbers of atoms present in a molecule of a compound |
| covalent bond | formed by the sharing of electron between atoms |
| formula unit | lowest whole number ratio of ions in an ionic compound |
| diatomic molecule | molecule consisting of 2 atoms |
| alloy | mixture consisting of 2 or more elements; at least one is a metal |
| How do ionic compounds form? | Electrons are transferred from one thing to another, when the ions get closer together, they will stick. |
| Describe the structure of an ionic compound. | they are made of anions(usually nonmetals) and cations (metals) and held together by ionic bonds |
| List several properties of ionic compounds | solid crystals at room temperature, strong electrostatic forces between ions, and dissolve in water and conduct electricity when dissolved in H2O |
| Describe the structure of a metallic substance | held on loosely because of a sea of electrons |
| List the 7 diatomic elements. | h2 (Hydrogen), O2(Oxygen) N2(Nitrogen), Cl2 (chlorine), Br2 (Bromine), I2 (Iodine), F2 (Fluorine) |
Created by:
mellyb13
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