Study the information below and answer the questions that follow. The letters do not represent the actual symbols of the elements.
|Element || Electronic |
| Ionization energy KJ/mol |
| 1st I.E|| 2nd I.E.|
| X|| 2.2|| 900|| 1800|
| Y|| 2.8.2|| 736|| 1450|
| Z|| 22.214.171.124|| 590|| 1150|
- What chemical family does the elements X, Y and Z belongs?
- What is ionization energy?
- The 2nd ionization energy is higher than the 1st ionization energy of each element. Explain.
- When a piece of element Z is placed in cold water, it sinks to the bottom and effervescence of a colourless gas that burns explosively is produced. Use a simple diagram to illustrate how this gas can be collected during this experiment.