Brooke+Sergeon


 * 1) What is a covalent bond?
 * 2) What is an ionic bond?
 * 3) List 5 differences between ionic and covalent compounds (Ex. high or low boiling and melting points, sharing or transferring electrons, etc.).
 * 4) Find 5 Lewis Structures and copy and paste them on your page. Determine their molecular geometry.

1. A covalent bond is a chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms. -the book.

2. An ionic bond is a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion. -the book.

3. Ionic compounds have high melting and boiling points, while covalent have low melting and boiling points. Covalents occur between two nonmetals, while Ionic occurs between one metal and one nonmetal. A covalent compound is a liquid or gas at room temperature, while Ionic is a solid at room temp. And covalent compounds have a definite shape, while Ionic does not have a definite shape.

4.

3/22.10 **Guide to Naming and Wriiting Formulas for Chemical Compounds**

1. HF- hydrofluoric acid hydrogen is in front in the formula HF, so I know that rule 1 says if the anion ends in ide, like fluoride, then the suffix is hydro and you change the ending of fluoride to fluoric. And it becomes hydrofluoric acid.

2. CF4- carbon tetrafluoride carbon and fluoride are nonmetals. So i know that carbon and fluoride will have those number prefixes in front. So it becomes carbon tetrafluoride.

3. hydroselenic acid- HSe It's hydro and the ending is in -ic, so I know its rule 1. Therefore, hydroselenic is HSe. - ** Check this one again. What's the charge on Se? **