Asked Jan 14, 2020
83 Which of the following electron configurations corre-
sponds to the ground state and which to an excited
Is 2
Is 2s

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83 Which of the following electron configurations corre- sponds to the ground state and which to an excited state? 2p 21 Is 2 2p 21 2p Is 2s 2p


Expert Answer

Step 1

An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles are arranged in a certain way in the atom and provide electrical neutrality to the molecule. Electrons are placed in different energy levels of an atom.

Step 2

The distribution of electrons in an atom can be shown with the help of electronic configuration. The electronic configuration of an element represents the number of electrons in different energy levels of an element. The energy levels must be arranged in increasing order of their energy and can only accommodate a certain number of electrons as given:

Chemistry homework question answer, step 2, image 1
Step 3

Part (a) is the excited state electronic configuration of B as the atomic number of B is 5 and the electronic configuration must be 1s2, 2s2, 2p1. In excited state, one of the el...

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