Chemistry Quiz 1 QTR
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are Symbols | Element Abbreviations
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| Al | Aluminum
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| Ar | Argon
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| BR | Bromine
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| Ca | Calcium
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| C | Carbon
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| Cl | Chlorine
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| Cu | Copper
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| F | Flourine
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| He | Helium
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| H | Hydrogen
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| I | Iodine
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| Iron | Fe
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| Mg | Magnesium
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| Mn | Manganese
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| Hg | Mercury
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| Ne | Neon
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| Nitrogen | N
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| O | Oxygen
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| P | Phosphorus
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| Potassium | K
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| Ag | Silver
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| Na | Sodium
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| Sulfur | S
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| Zn | ZInc
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| What is a formula | Abbreviation for compound
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| Group IA Elements have what Oxidation # | +1
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| Group IIA Elements have what Oxidation # | +2
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| Group VIA Elements have what Oxidation # | -2
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| Group VII ELements have what Oxidation # | -1
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| What does (I) or (II) after Cu mean? | Oxidation #
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| What does (II) or (III) after Fe mean? | Oxidation #
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| What elements have an oxidation number of 0 if they are in a diatomic molecule? | Cl, F, H, I, N, O, Br
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| Does H have a Oxidation # of +1 or 0 in water? | +1
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| WHat is superscript? | Numbers up and to the right
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| What does super script denote? | Charge
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| What is subscript? | Numbers down and to the right
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| WHat does is denote? | Atomic quantity with in a formula
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| 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)
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| 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
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| 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!
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| WHat is a poly atomic ion? | Groups as atoms that act as one atom
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| 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.
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| Ammonium | NH4 +1 (only positively charged polyion)
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| Bicarbonate | HCO3 -1
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| Cyanide | CN -1
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| Hydroxide | OH -1
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| Hypochlorite | OCl -1
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| Nitrate | NO3 -1
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| Nitrite | NO2 -1
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| Carbonate | CO3 -2
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| Sulfate | SO4 -2
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| Sulfite | SO3 -2
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| Phosphate | PO4 -3 (only -3 polyion)
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| Helpful Hint #1 | If a polyion starts with the letter B, H or N it will have a -1 charge
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| 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).
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