JEE MAIN - Chemistry (2021 - 24th February Evening Shift - No. 10)
What is the correct order of the following elements with respect to their density?
Cr < Zn < Co < Cu < Fe
Cr < Fe < Co < Cu < Zn
Zn < Cr < Fe < Co < Cu
Zn < Cu < Co < Fe < Cr
Explanation
Generally, due to decrease in metallic radius and increase in atomic mass density increase across the period from left to right.
| Metal | Density $$(g/c{m^3})$$ |
|---|---|
| Zn | 7.13 |
| Cr | 7.19 |
| Fe | 7.8 |
| Co | 8.7 |
| Cu | 8.9 |
Correct order is Cu > Co > Fe > Cr > Zn.
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