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by (222 points)
The trend in properties of elements while crossing from top to bottom as follows:
1. The atomic number of elements increases
2. The atomic weight of elements increases
3. The atomic size and volume are increases
4. The electro positivity increases and the electro negativity decreases
5. The metallic character increases and non-metallic character decreases
6. The ionization potential decreases
7. The electro affinity of elements decreases
8. The melting point and boiling points are increases
9. The elements of a group all the equal in their properties.
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