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Solution:  Fill in the blanks to complete the table.  ...

Question

 Fill in the blanks to complete the table. 

Video Transcript

Hey guys, in this this question we're given a chart with the following information now from this we have to identify either subatomic particles charge or the identity of the element so let's take a look, so for the first one we're dealing with is Silicone here and we're given the atomic number remember the atomic number gives us the number of protons it also uses the symbol Z, here the atomic mass is represented by A that's the number of protons and neutrons combined so how do we come up with this? All you do is you add up the number of protons from the atomic number with the number of neutrons so that gives me an atomic number of 28, here your atomic number gives you the number of protons so it's 14 as well and if your number of protons and electrons are equal then your charge overall is 0. For the next, we're dealing with sulfur so all we have to do is look at the periodic table the atomic number Sulphur is 16, here the atomic number gives us the number of protons so this is also 16, here it has a -2 charge when Sulfur is neutral it has the same number of protons and electrons but here -2 means it's gained 2 additional electrons so now it has 18 electrons and then here to figure out the number of neutrons you just subtract the atomic mass A by atomic number Z so it would be 32-16 which gives me 16, Alright copper when we look on the periodic table has an atomic number of 29 which means it's protons are also 29, +2 means its lost 2 electrons when it's neutral it has 29 protons 29 electrons, +2 means it's lost 2 electrons so now it has 27, to figure out the atomic mass we add up the number of protons with the number of neutrons when we add those together that gives me my atomic mass of 63. Now here we look at the periodic table to see which element has an atomic number 15 and the answer would be Phosphorus, here it has the same number of protons and electrons so it's neutral so it's charge is 0 and then again remember add up the protons and the neutrons together and that gives me my atomic mass of 31 so this covers a lot of the topics we've talked about earlier questions so just remember how the subatomic particles are related to one another and then how they can contribute to the overall charge if we have less electrons it will become more positive if we have more electrons our element becomes negative.

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