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24 Cards in this Set
- Front
- Back
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Atoms of metals on the left of the periodic table ... electrons to form .... |
Lose Cations |
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Atoms of non-metal on the right of the periodic table ... electrons to from ... |
Gain Anions |
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What is a binary compound? |
It contains 2 elements only E.g. sodium and oxygen from sodium oxide |
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How do you name a binary compound? |
Use the name of the first element but change the ending of the second elements name to -ide For ionic compounds, the metal ion always comes first |
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What are polyatomic ions? |
When an ion contains atoms of more than one element bonded together |
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What is the charge of ammonium (NH 2 )? |
1+ |
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What is the charge of hydroxide (OH)? |
1- |
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What is the charge of nitrate (NO3)? |
1- |
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What is the charge of nitrite (NO2) |
1- |
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What is the charge of hydrocarbonates (HCO3)? |
1- |
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What is the charge of manganate (vii) (permanganate) (MnO4)? |
1- |
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What is the charge of carbonate (CO3)? |
2- |
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What is the charge of sulfate (SO4)? |
2- |
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What is the charge of sulfite (SO3)? |
2- |
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What is the charge of ditchromate (vi) (Cr2O7)? |
-2 |
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What is the charge of phosphate (PO4)? |
3- |
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What does an ionic compounds contain? |
It contains a cation and an anion |
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How do u know the number of ions present? |
It is a shown as the a subscription after the ion |
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The ionic charges are usually omitted in the .. |
Completed formula |
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In a formula what are brackets used for? |
They are used if there is.more than one polyatomic ion |
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In an equation how are elements shown? |
They are simply shows as there symbol except for the few elements that exist as a small molecules. Most of these elements exist as diatonic molecules, containing two elements bonded together |
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How do covalent bonds exist? |
Covalent bonds do not contain ion. Most covalent bonds exist as molecules with a small number of atoms bonded together E.g. CO2 H2O In equations, the formula of the molecule is used. |
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What is the formula unit? |
It is the formula worked out from the ionic charges used in equations for ionic compounds |
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What is aqueous? |
Something dissolved in water |
