1.
The element A belong to third period and I A group.
The element B belongs to second period and VI A group.
The element C belongs to third period and VII A group.
2.
The element A is metal and B and C are non-metals.
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The electronic configuration of some elements is given on the table.
Element |
Electronic configuration |
A |
2, 8, 1 |
B |
2, 6 |
C |
2, 8, 7 |
1.
The element A belong to third period and I A group.
The element B belongs to second period and VI A group.
The element C belongs to third period and VII A group.
2.
The element A is metal and B and C are non-metals.
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