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mamaluj [8]
2 years ago
5

Why does the d block start in the fourth row of the periodic table

Chemistry
1 answer:
natita [175]2 years ago
3 0

Answer:

Why does D-block start on the fourth row of the periodic table?

Explanation:

The require more energy to reach 3d than 4s, and they fill up 4p before 4d, and so forth. ... The energy is lower for 6s than 4f, and 4f and 5f are lower in energy than the final D level.

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