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7 Cards in this Set
- Front
- Back
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What is the reactivity trend as you go down group 2? |
As you go down the group, the ionisation energies decrease because the atomic radius increases and the shielding effect. |
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How do Group 2 elements react? |
When group 2 elements react, they are oxidised from a state of 0 to +2, forming 2+ ions. |
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How do group 2 elements react with water? |
The group 2 elements react with water to give a metal hydroxide and hydrogen. E.g. - Ca + 2H20 = Ca(OH)2 + H2 |
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How do group 2 elements react with oxygen to form oxides? |
When Group 2 metals burn in oxygen, you get solid white oxides. Oxygen is reduced from 0 to -2. The group 2 is oxidised from 0 to +2. |
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How do group 2 elements react with dilute acid? |
When group 2 elements react with dilute hydrochloric acid, you get a metal chloride and hydrogen. |
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How are group 2 oxides and hydroxides bases? |
The oxides of group 2 react with water to form metal hydroxides, which dissolve. The hydroxide ions make these solutions strongly alkaline. The oxides form more strongly alkaline solutions as you go down the group because the hydroxides get more soluble. |
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How are group 2 compounds used as a neutralisation agent? |
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