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Question
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
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Solution
Structure of atoms:
Z is Atomic Number and A is the mass number
Silicon \[\ce{^28_14Si}\]
Z = 14 = p = e
K L M
e = 14 = 2, 8, 4
A = p + n
28 = 14 + n
∴ n = 28 − 14 = 14
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