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221.
What subshells are possible in n = 3 energy level?

For n = 3 energy level, the possible values of l are 0, 1 and 2. Thus, there are three subshells namely:
l = 0, s subshell ; l = 1, p subshell ; and l = 2, d subshell.

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222. What is the lowest value of n that allows g orbitals to exist ?

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223.

Using s, p, d notations describe the orbital with the following quantum numbers :
(a) n = 1, l = 0,
(b) n = 3, l = 1,
(c) n = 4, l = 2,
(d) n = 4, l = 3.

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Long Answer Type

224.

State and explain Pauli's Exclusion Principle.

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Short Answer Type

225. Why Pauli’s exclusion principle is called exclusion principle?

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226. Why in the building of the atom, the filling of 4s orbital takes place before 3d orbital?

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Long Answer Type

227. Describe Aufbau Principle.

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228.

Discuss the shapes of s-orbitals.

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Short Answer Type

229. Give three points of difference between 1s and 2s orbitals.

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230.

The bromine atom possesses 35 electrons. It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electrons in 4p orbital. Which of these electron experiences the lowest effective nuclear charge?

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