Distribution of Electrons

Distribution of Electrons - The first shell has one...

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Distribution of Electrons Electron Shells The different energy levels are also called electron shells . The first shell is the K shell, the next is the L, followed by M, N, etc. Electrons in the K shell have the least energy. Electrons that are further from the nucleus have more potential energy . The maximum number of electrons in each shell is given by the formula 2N 2 where N is the shell number. From this formula, the maximum number in each shell is 2, 8, 18, 32, etc. The maximum number of electrons in the last (outer) shell is 8. Orbitals It is convenient to draw electrons as occupying a circular space around the nucleus. In reality, electrons do not move around the nucleus in circles. Pairs of electrons occupy spaces called orbitals. An orbital can hold 2 electrons.
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Unformatted text preview: The first shell has one spherical orbital called the 1s orbital. The second shell has 4 orbitals. One is spherical (called 2s) and the other three are dumbbell-shaped and at right angles to each other. These are referred to as 2p orbitals. The arrangement of three dumbbell-shaped orbitals can be in the model shown below. The third and higher shells have s and p orbitals as well as other kinds of orbitals. The Outer Shell The inner shells of atoms are filled with the maximum number of electrons but the outer shells may or may not be filled. . An atom with only one shell requires two electrons to complete its outer shell. Atoms with more than one shell require 8 electrons to complete their outer shells....
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