The colour of copper sulphate solution is blue
I’m so sorry about the other guy! The answer is A. Infertile soil honey
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- Frequency=v=2×10^15Hz
- Energy=E
Using planks quantum theory




Metals are to the left of the zig-zag, nonmetals are to the right, and metalloids lie on/beside the line.
Answer:
The atoms in the first period have electrons in 1 energy level. The atoms in the second period have electrons in 2 energy levels. The atoms in the third period have electrons in 3 energy levels. The atoms in the fourth period have electrons in 4 energy levels.