When filling degenerate orbitals, electrons fill them singly first, with paralle

Question

When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as Choose the best Lewis structure for BeF_2. Which of the following statements is TRUE? An orbital that penetrates into the region occupied by core electrons is more shielded from n orbital that does not penetrate and therefore has a lower energy. An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear that does not penetrate and therefore has a lower energy. Two electrons in the same orbital can have the same spin. It is possible for two electrons in the same atom to have identical values for all four quantum number None of the above are true. Place the following elements in order of increasing atomic radius. Cl

Explanation / Answer

Answer 24) D) Pauli exclusion principle

Answer 25) A) single covalent bond

Answer 26) D) Hund's rule

Answer 27 ) C)

Answer 28 ) b)An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.

answer 29 ) A) P<Cl<Ba

Answer 30) C) Aufbau principle

answer 31) D) 3 bonding pair 2 lone pair

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