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Chemistry Quiz 1 QTR
| Question | Answer |
|---|---|
| What are Symbols | Element Abbreviations |
| Al | Aluminum |
| Ar | Argon |
| BR | Bromine |
| Ca | Calcium |
| C | Carbon |
| Cl | Chlorine |
| Cu | Copper |
| F | Flourine |
| He | Helium |
| H | Hydrogen |
| I | Iodine |
| Iron | Fe |
| Mg | Magnesium |
| Mn | Manganese |
| Hg | Mercury |
| Ne | Neon |
| Nitrogen | N |
| O | Oxygen |
| P | Phosphorus |
| Potassium | K |
| Ag | Silver |
| Na | Sodium |
| Sulfur | S |
| Zn | ZInc |
| What is a formula | Abbreviation for compound |
| Group IA Elements have what Oxidation # | +1 |
| Group IIA Elements have what Oxidation # | +2 |
| Group VIA Elements have what Oxidation # | -2 |
| Group VII ELements have what Oxidation # | -1 |
| What does (I) or (II) after Cu mean? | Oxidation # |
| What does (II) or (III) after Fe mean? | Oxidation # |
| What elements have an oxidation number of 0 if they are in a diatomic molecule? | Cl, F, H, I, N, O, Br |
| Does H have a Oxidation # of +1 or 0 in water? | +1 |
| WHat is superscript? | Numbers up and to the right |
| What does super script denote? | Charge |
| What is subscript? | Numbers down and to the right |
| WHat does is denote? | Atomic quantity with in a formula |
| WHat are the first two rules for writing formulas? | 1. Write the positively charged element first and negatively charged second ( Parenthesis will denote charge) EX. H(+1) O (-2) 2. Find the lowest common denominator between the atoms ( In the example above, it is 2) |
| WHat is the third rule for writing formulas? | 3. Multiply the subscript by the superscript. Do this by recognizing the common denominator then how many of each atom it will take to match it EX. H (+1) and O (-2), it will take 2 Atoms of H to match the -2 charge of O |
| What is the fourth rule for writing formulas? | Make sure your charges equal 0 H (+1) O (-2)= H (+1) H (+1) O (-2)= H2O and charge = 0 Yeah! |
| WHat is a poly atomic ion? | Groups as atoms that act as one atom |
| How do you calculate charge of a polyatomic ion, individually or as a whole? | As a whole. Don't break these down, or you will have a break down. |
| Ammonium | NH4 +1 (only positively charged polyion) |
| Bicarbonate | HCO3 -1 |
| Cyanide | CN -1 |
| Hydroxide | OH -1 |
| Hypochlorite | OCl -1 |
| Nitrate | NO3 -1 |
| Nitrite | NO2 -1 |
| Carbonate | CO3 -2 |
| Sulfate | SO4 -2 |
| Sulfite | SO3 -2 |
| Phosphate | PO4 -3 (only -3 polyion) |
| Helpful Hint #1 | If a polyion starts with the letter B, H or N it will have a -1 charge |
| Helpful Hint #2 | If a polyion ends in -ate it always has more oxygen than if it ends with -ite (EX. Nitrate (NO3) Nitrite (NO2). |
Created by:
Benjaminschmidt66
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