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Arnab Sen | StemPy Lab
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Dr. Arnab Sen
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Joined 2026-08-06
PhD in Physics · Assistant Professor
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Latest from this teacher
Problem
The B₂ molecule has 10 electrons. Write its configuration, find its bond order, and find the number…
2026-10-27
Problem
Arrange O₂, O₂⁺, O₂⁻ and O₂²⁻ in order of increasing bond length. Which of them are paramagnetic?
2026-10-27
Problem
Nitrogen, N₂, has 10 bonding and 4 antibonding electrons.
2026-10-27
Problem
Two helium atoms have four electrons between them.
2026-10-27
Problem
The C₂ molecule, found in flames and in comets, has 12 electrons.
2026-10-27
Problem
Two atoms of the second period come together, and each brings its 1s, 2s and three 2p orbitals.
2026-10-27
Problem
Phosphorus is 3s² 3p³. Explain how it forms five bonds in PCl₅ and name the hybridisation.
2026-10-27
Problem
Ethene, CH₂=CH₂, is flat. What is the hybridisation of each carbon atom?
2026-10-27
Problem
In ethane, ethene and ethyne, the carbon atoms are sp³, sp² and sp.
2026-10-27
Problem
Hydrogen chloride, chlorine and nitrogen are all covalent.
2026-10-27
Problem
Count the sigma and pi bonds in propene, CH₂=CH-CH₃, and in propyne, HC≡C-CH₃.
2026-10-27
Problem
The bond enthalpy of hydrogen is 435.8 kJ mol⁻¹.
2026-10-27