The electronic configuration of the elements are given below.
A-`1s^2 2s^2 2p^6 3s^2 3p^4`
B-`1s^2 2s^2 2p^6 3s^2`
C-`1s^2 2s^2 2p^6 3s^2 3p^5`
D-`1s^2 2s^2 2p^6 3s^1` Which is the period number of the elem-ent A? What is the basis of your find-ings?

The electronic configuration of the elements, are given below. A- 1s^2 2s^2 2p^6 3s^2 3p^4 B- 1s^2 2s^2 2p^6 3s^2 C- 1s^2 2s^2 2p^6 3s^2 3p^5 D- 1s^2 2s^2 2p^6 3s^1 Which metal belongs to 17^(th) group?

The electronic configuration of the elements are given below. A- 1s^2 2s^2 2p^6 3s^2 3p^4 B- 1s^2 2s^2 2p^6 3s^2 C- 1s^2 2s^2 2p^6 3s^2 3p^5 D- 1s^2 2s^2 2p^6 3s^1 Which of these elements show +2 oxida-tion state?

The electronic configuration of the eleme-nts, A,B,C,D are given below. 1s^2 2s^2 2p^6 3s^2 3p^4 , 1s^2 2s^2 2p^6 3s^2 , 1s^2 2s^2 2p^6 3s^2 3p^5 , 1s^2 2s^2 2p^6 3s^1 Which of these elements can form basic oxides?

The subshell electronic configuration of A,B,C and D are given below. A - 1s^2 2s^2 2p^6 3s^2 3p^4 B - 1s^2 2s^2 2p^6 3s^2 C - 1s^2 2s^2 2p^6 3s^2 3p^5 D - 1s^2 2s^2 2p^6 3s^1 a. Which of these elements can show +2 oxidation state? b. Which element belongs to 17th group? c. Find the period of elements A what is the basis of this finding? d. Which of these elements can form oxides of basic character?

Examine the given electronic configurations. A- 1s^2 2s^2 2p^6 3s^2 3p^6 3d^(10) 4s^2 B- 1s^2 2s^2 2p^6 3s^1 C- 1s^2 2s^2 2p^6 3s^2 3p^6 D- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 : Which of these elements belongs to 4^(th) period ?

Examine the given electronic configurations. A- 1s^2 2s^2 2p^6 3s^2 3p^6 3d^(10) 4s^2 B- 1s^2 2s^2 2p^6 3s^1 C- 1s^2 2s^2 2p^6 3s^2 3p^6 D- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 : Which elements belongs to the same group?

Examine the given electronic configurations. A- 1s^2 2s^2 2p^6 3s^2 3p^6 3d^(10) 4s^2 B- 1s^2 2s^2 2p^6 3s^1 C- 1s^2 2s^2 2p^6 3s^2 3p^6 D- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 : Which element has highest metallic ch-aracter ?

Examine the given electronic configurations. A- 1s^2 2s^2 2p^6 3s^2 3p^6 3d^(10) 4s^2 B- 1s^2 2s^2 2p^6 3s^1 C- 1s^2 2s^2 2p^6 3s^2 3p^6 D- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 : Which element doesn’t participate in che-mical reactions generally ?