erinbruce.

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What is a covalent bond? //A covalent bond is chemical bond that involves sharing a pair of electrons between atoms in a molecule.// []

What is an ionic bond? //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.// []

List 5 differences between ionic and covalent compounds. //In covalent, atoms share electrons, but in ionic, one atom gives them to the other. So in an ionic compound, there is a positive ion and a negative ion. They ions can separate when put in water, and then the electricity can pass through. Covalent compounds don't have a positive pole and a negative pole, and they don't ionize in water. Also, the ionic bond is kinda stronger, so usually the compound is solid at room temperature (salt is ionic, oil is covalent). You have to know that there is a third category, a polar molecule (like water).// []

Find 5 Lewis Structures and copy and paste them on your page. Determine their molecular geometry. //bent// []

//trigonal planar// []

//tetrahedral// []

//square pyramidal// []

//seesaw// []

"guide to naming and writing formulas for chemical compounds" le 23 mars.

__//formulas to names://__

okay, so to put Mg 3 (PO 4 ) 2 into a chemical name, you have to notice that the PO 4 is a polyatomic, so bam! there's your second part of your name. for the first part you just look at Mg, know that it's magnesium and that magnesium isn't a transition metal, so you don't need roman numerals or anything. so, yeah. magnesium phosphate.
 * Mg 3 (PO 4 ) 2 -- magnesium phosphate**

okay, so to name H 3 P, you first notice the H. ding ding ding, now you know it's an acid! so now this is 5,521,569,841,535,284,852,634,570 times easier! just look at the rules for naming acids! follow the rules, ad the suffix ic, and you get phosphic acid.
 * H 3 P -- hydrophosphic acid**

__//names to formulas://__

to put dinitrogen pentoxide into a formula, you have to THINK. the first thing you should do is look at the name. it has prefixes, so it's super easy now! you just take the element symbol and add the number in which the prefix represents. it ends up being N 2 O 7.
 * dinitrogen pentoxide -- N 2 O** **7**

please accept these pictures of smiling fish instead.
 * mister walk, the internet doesn't have pictures of these formula things.





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