Application Periodic Table

Which of following are isoelectronic species?

• Phosphorus,Sulphur,Chlorin

• Fluorin,Aluminium,Bromine

• Magnesium,Calsium,Barium

Which of following is anomalous cases for ionization energy in Period 3?

• Chlorine and Argon

• Sodium and Magnesium

• Phosphorus and Sulphur

What is the valence electron for Potassium,K?

• 4s1

• 3s2 3p3

• 2s1

What is electronic configuration for P3-?

• 1s2 2s2 2p6 3s2 3p3

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6

Which of element are use in vulcanization of rubber?

• Sulphur

• Potassium

• Sodium