Question

1S²,2S² 2p⁵
1S²,2S² 2P⁶,3S¹
1S²,2S² 2P⁶,3d⁶,4S²
a) which element shows different oxidation state?
b) which among those have hig electronegativity?
c) which element has greater atomic radius?​

Answer 1

a) the third option shows different oxidation state as it is a “d block” element (Fe)
b) the first option have high electronegativity as it is a halogen (F)
c) the second option have greater atomic radius as it is in the left side of the periodic table (Na)

Answer 2

Answer:

(a) 1S²,2S² 2P⁶,3d⁶,4S²

(b) 1S²,2S² 2p⁵

(c) 1S²,2S² 2P⁶,3S¹