There are many important topics that we have to study in this chapter such as

Group 15 Elements –

• General electronic configuration – AS² AP³
• Elements – ₇N, ₁₅P, ₃₅AS ₅₁SB, ₈₃B, ₁₁₅MC
• Physical Properties :- Atomic radii, Melting Point, I.P., Electronegativity, Allotropy.
• Chemical Properties : – Oxidation state, Halides, Hydrides, oxides, Reactivity towards metals.
• Dinitrogen  (N₂) – Preparation, chemical Properties
• Ammono (NH₃) – Preparation, chemical Properties.

Phosphorus

• Types of Phosphorus :- White, Red and Black.
• Phosphine (PH₃) Preparation, Properties
• Group 16 Elements 
• General electronic configuration – NS²NP⁴
• Elements – ₈O, ₁₆S, ₃₁Se, ₅₂Te, ₈₄Po, ₁₁₆Lv
• Physical Properties:- Atomic and ionic radii, I.P, Electro-negativity, Molecular state.
• Dioxygen :- Preparation , Properties.
• Group 17 Elements –
• General electronic configuration – ns2np5
• Elements – ₉F, ₁₇Cl, ₃₅Br, ₅₃I, ₈₅At, ₁₁₇Ts
• Physical Properties :- Atomic Radii, I.P., Electronegativity, Melting and Boiling Pont, Electron gain enthalpy.
• Chemical Properties : – Oxidation state, Hydrogen halides, oxides, Metal holides.
• Chlorine (cl₂) – Preparation, Physical and chemical Properties
• Hydrogen chloride – Lab Preparation, Physical Properties and chemical Properties, Aqua regia