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Chemistry Question

Questions that were given by Mr Tan :

1. What does an atom looks like? What are the sub-atomic particles inside it.....(talk about electrons, neutrons, protons, electron shells, nucleus....)

2. Draw the atomic structure of a sodium atom and a sodium ion....explain why you draw it this way.

3. Draw the atomic structure of a sulfur atom and a sulfide ion....explain why you draw it this way.

4. Chlorine-35 atom and Chlorine-37 atom are called isotopes...Use these two examples to explain what is 'isotopes'.

5. Sodium is a metal and sulfur is a non-metal....why we classify them this way??