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Chemistry Quiz 1 QTR

QuestionAnswer
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).