Question

A. Match column A to column B. Write the correct letter on your answer sheet A B
1. 1s2, 2s2, 2p3 A. Calcium (20) 2. 1s2, 2s2, 2p6, 3s2, 3p4 B. Chlorine (17) 3. 1s2, 2s2, 2p6, 3s2, 3p5 C. Potassium (19) 4. 1s2, 2s2, 2p6, 3s2, 3p6, 4s2 D. Sulfur (16) 5. 1s2, 2s2, 2p6, 3s2, 3p6, 4s1 E. Nitrogen (7)

Answer 1

$1s^{2} ,2s^{2} ,2p^{3}$                      ⇒ Nitrogen(7)

$1s^{2} ,2s^{2} ,2p^{6},3s^{2} ,3p^{4}$         ⇒ Sulfur(16)

$1s^{2} ,2s^{2} ,2p^{6},3s^{2} ,3p^{5}$          ⇒ Chlorine(17)

 

$1s^{2} ,2s^{2} ,2p^{6},3s^{2} ,3p^{6} ,4s^{2}$    ⇒ Calcium(20)

$1s^{2} ,2s^{2} ,2p^{6},3s^{2} ,3p^{6} ,4s^{1}$    ⇒  Potassium(19)