Now calculating the maximum number of electrons that can be added to the L shell:įor L shell, maximum number of electrons = 2 X (2) 2 = 8 Hence, the K shell consists of two electrons, and the silicon atom after adding two electrons to its K shell looks like this: Now, calculating the number of electrons that can be accommodated in the first (K) shell:įor the K shell, maximum number of electrons = 2 X (1) 2 = 2 Maximum number of electrons in a shell (N) = 2n 2 The number of electrons that can be accommodated in a shell is given by the formula: Now, let us find the position of these electrons inside the atom. This means that 14 electrons are revolving around the nucleus of the Silicon atom. Therefore, in the Silicon atom, number of electrons = Atomic Number = 14 Now, let us try to find the number of electrons in the Silicon atom, Here, p + represents proton and n° represents neutron. Therefore, Number of neutrons in Silicon = 28 – 14 = 14Īs the neutrons and protons are located in the nucleus of an atom, the nucleus of Silicon can now be drawn as follows: Number of neutrons = Atomic mass (rounding it up to the nearest whole number) –Īs mentioned in the previous section, the atomic number of Silicon is 28.086, rounding it up to the nearest whole number gives 28. Now, finding the number of neutrons in the Silicon atom, Therefore, number of protons in Silicon = Atomic Number of Silicon = 14 In the case of Silicon, the atomic number = 14 The atomic number of an atom is always equal to the number of protons that an atom contains. To draw the Bohr model of silicon we shall first identify the number of atomic species present in this atom.įirst, let us find out the number of protons in the Silicon atom.
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