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Sulfur has an atomic number 16. As the number of protons in sulfur is 16, there are 16 electrons in orbit around the nucleus.
Electrons are found in shells in an atom with each shell consisting of sub shells. The nth shell can have a total of 2*n^2 electrons. Each shell is made up of sub shells with values l = 0, 1, 2, 3... that correspond to s, p, d, f sub shells. For any value of l, the sub shell can have 2(2l + 1) electrons.
The first shell has only one sub shell which has an l value of 0 and is the s sub shell. The second shell has 2 sub shells, s and p and can accommodate 8 electrons. The third sub shell has 3 sub shells s p and d.
The electron configuration of sulfur is 1s2, 2s2, 2p6, 3s2, 3p4
The noble gas configuration is [Ne], 3s2, 3p4
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