Classification of Elements and Periodicity in Properties

Which of the following electronic configuration will have maximum IP difference between II^nd and III^rd ionisation potential?

• 1s², 2s² 2p⁶, 3s¹

• 1s², 2s² 2p⁶, 3s²

• 1s², 2s² 2p⁶

• 1s², 2s² 2p⁵

The Modern Periodic Table is based on the properties of elements as a function of

• atomic number

• atomic mass

• electronegatvity

• electron affinity

Atomic radii of which metals are same?

• Cr, Mn, Cu

• Cr, Fe, Co

• Sc, Ti, Zn

• V, N, Cr

The correct order of electron affinity of oxygen, sulphur, chlorine, fluorine is

• S < O < Cl < F

• S < O < F < Cl

• O < S < F < Cl

• O < S < Cl < F

Which of the following is the correct decreasing order of oxidation state of nitrogen?

• HNO₃ > NO > NH₄Cl > N₂

• HNO₃ > NO > N₂ > NH₄Cl

• HNO₃ > NH₄Cl > NO > N₂

• NO > HNO₃ > NH₄Cl > N₂