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If the electron in the hydrogen atom is replaced by muon(μ-)[ charge same as electron and mass 207me], the first Bohr radius and ground state energy will be- (merepresents mass of electron) 1. .53×10-13m,-3.6eV 2. 25.6×10-13m,-2.8eV 3. 2.56×10-13m,-2. b = A + B. a = A - B. Molecular orbital of lower energy is known as bonding molecular orbital and of higher energy is known as antibonding molecular orbital. Molecular orbitals are characterised by a set of quantum numbers. Aufbau rule, Pauli's exclusion principle and Hund's rule are applicable to molecular orbitals. The discipline seeks to explain and predict events at the atomic and molecular level. Justify all your answers with structures or reaction equations. ... Chemistry grade 10 questions and answers pdf Grade 10 students and faculty may find a great collection of multiple choice questions of physics, biology, chemistry and math.May 29, 2016. 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