In the following table six elements A, B, C, D, E and F here letters are not the usual symbols of the elements

CBSE Class 10 CBSE Class 10 Science
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1

In the following table six elements A, B, C, D, E and F here letters are not the usual symbols of the elements of the Modern Periodic Table with atomic numbers 3 to 18 are given:

3 4 5 6 7 8 9 10
A E G
11 12 13 14 15 16 17 18
B C D F
  1. Which of these is
    (i) a nobel gas
    (ii) a halogen?
  2. If B combines with F, what would be the formula of the compound formed ?
  3. Write the electronic configuration of C and E.
2

1
(i) G (since it has 8 electrons in their outermost shell).
(ii) F (it has 7 electrons in their outermost shell).

2.BCl

3.C (12) : 2, 8, 2 ; E (8) : 2, 6.