So in this silicon 29 the number off proton is again 14 and in silicon 30 the number off proton is again 14 So the number of protons is not change because the ethnic number off silicon is fixed which is 14 now number off electron is also they say, because there is no charge on this silicon atom. So the number offer proton in silicon 28 is 14 because he at MC number off silicon which is represented by said is 14. Okay, so the ice atop off silicon tree, I set up a silicon is silicon 28 silicon 29 and silicon Turkey. So now So this is Theo is a top number off Proton number off electrons and number off neutrons. So now coming to the question part, we can complete the table. So that means these who are the isotopes. So that means the number off neutrons are different. If we calculate the number off neutron in C 12, I set up number off neutrons in C 12, which is a cult 12 minus six six, and the number off neutrons in C 14, which is equal to 14 minus six, which is equal to eat. So basically, this a represents the mass number and that represents the atomic number. We can calculate by using this formula which is equal to a minus set. The different number off neutrons, for example, carbon have to isotope carbon 12 and carbon 14 and the number off for neutron. Arthuis atoms off the same element with different number off neutrons. So now we understand the term isil talk at times off the same element. So the ethnic number off Silicon cert is 14 and the symbol off silicon is s I. So the concept behind this question is the isotopes. So this question is from the chapter atoms and moles. In problem 35 copy and completely following table concerning the three isotopes off silicon.
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