CHEMISTRY PROJECT - 51

51

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1. How can the subshell configuration of Mg be written
in short form ?
[Ne] 3s²

2. What is the relation between the sub shell to which
the last electron was added and the block to which
the element belongs ?
The name of the block is the same as the sub-shell in which last electron was added.

3. Identify the correct electronic configuration of
    Cu-29 from those given below :
   1S² 2S² 2P⁶ 3S² 3d¹⁰ 4S¹
   1S² 2S² 2P⁶ 3S² 3d⁹ 4S²
1S² 2S² 2P⁶ 3S² 3P⁶ 3d¹⁰ 4S¹

4. Write the electronic configuration of Cr
1S2 2S2 2P6 3S2 3P6 3d5 4S1

5. Elements are arranged below the main body of the
periodic table in two rows. To which block they belong to ?
f block

TEST QUESTIONS-2