Question

please help me my exam is going on pls

Answer 1

Answer:

1 option C

Step-by-step explanation:

1 option c and I don't know all

Answer 2

Answer:

Step-by-step explanation:

1).option-A,C

2).f-block

3).1s,2s,3s,3p,4s,3d

4).$1s^2,2s^2,2p^6,3s^2,3p^5$  ; valency is 1

5).Fe - $1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^5$

   $Fe^{2+}$ - $1s^2,2s^2,2p^6,3s^2,3p^6,4s^1,3d^5$

   $Fe^{3+} - 1s^2,2s^2,2p^6,3s^2,3p^6,3d^5$

6).

$4s^1$ - colouring

$3p^5$ - non metal

$3d^6$ - metal

7). a). 13

    b). 3

    c). $Al_{2}O_{3}$

8).  a). +3

     b). +7

     c). +2

9). $1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^8$

     atomic number - 28

     Period - 4

     group - 10

Hope this helps you a Lot

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