Planning for Excellence - Atoms and ions QUESTION 1, 2011

Explain why the ions formed by sodium and oxygen both have the same electron arrangement. In your answer you should: ● describe an ion ● describe the atomic structures of a sodium ion and an oxide ion ● state the charge on the sodium ion and the oxide ion ● explain the charges on both ions in terms of electron arrangement and number of protons.

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HOW TO ANSWER 1. Go back through the question and underline the bits you need to do. Ex plain why the ions formed by sodium and ox y gen both hav e the same electron arrangement. In y our answer y ou should: ● describe an ion ● describe the atomic structures of a sodium ion and an ox ide ion ● state the charge on the sodium ion and the ox ide ion ● ex plain the charges on both ions in terms of electron arrangement and number of protons.

2. Organise your answer MAKE SURE YOU HAVE ALL THE UNDERLINED BITS e.g.

3. Write a concise (to the point) answer using links like: therefore, however, both (or similarly), in contrast...

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