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Question
State the main helpful features of the long form of the periodic table.
Solution
Long-form of the periodic table has 7 periods horizontal rows and 18 groups vertical columns and properties show regular gradations in periods and also in groups, i.e.
| Electronegativity | → | Increases in a period |
| ↓ | decreases in a group | |
| Non-metallic character | → | Increases in a period |
| ↓ | decreases in a group | |
| Size of an atom | → | decreases in a period |
| ↓ | Increases in a group |
and so on.
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