Fill in the gaps for the following table.

Question

Table showing ions with columns for symbol, protons, neutrons, electrons, mass number, and net charge.

Accepted Answer

So here the practice question says, fill in the gaps for the following table. So for the first column, we have our symbol, and this just encompasses our element symbol and its charge. This charge comes from the result of adding up all your protons and electrons, and because of that, we can call it more specifically the net charge. So here the net charge is 3 plus. Now protons. We know that protons are equal to our atomic number z. But here we don't have a column for atomic number z, so we're gonna say instead that the protons are connected to the electrons, and together they give us our net charge. Neutrons, we're gonna say neutrons here, equal your mass number, which is a, minus z, which is your atomic number. But, again, because we don't have atomic number as a column, we'll just say since z equals number of protons, we're gonna say it's minus protons. Then electrons, you can also group with protons in order to determine our charge. And then mass number here, mass number is a. It comes from looking at the number of protons plus neutrons within an element or an ion. And then charge can be again determined by looking at the number of protons know what its atomic number will be. We just look it up on the periodic table, we know what its atomic number will be. We just look it up on the periodic table. So CO is cobalt. It has 27 protons because its atomic number is 27. Next, determining the number of neutrons, we're gonna take the mass number, which is 59, and minus it by the 27 protons, and that'll give us 32 neutrons. For electrons, we can say here for electrons the number of protons is 27. We don't know, let's see. We don't know how many electrons we have here, so electrons will be unknown. Then we're going to say next that our charge is plus 3 because here's 3 plus. We're going to subtract 27 here from both sides. Now, that gives us negative 24, which makes sense because each electron is negatively charged, so that'll give us 24 electrons. So again, we get 20 negative 24, but negative 24 means there's there's 24 negative electrons. So you have to go just be 24. For the next one, we know the proton number is 34, so we know the atomic number. Looking on the periodic table that would give us selenium or Se as our element symbol. Mass number comes from adding up the protons plus the neutrons, so that would give us 80 as our mass number. Then we know the number of protons we have is plus 34, plus our 36 electrons, that's negative 36 because each electron is negatively charged. So overall this would be 2 minus or minus 2. So this would be selenium ion, Se 2 minus. Alright. Next, we have 76 here. Look on the periodic table that gives us OS, which is osmium. Alright. Number of electrons would be 76, plus the number of electrons, which you don't know, plus the net charge, which is 2 plus or plus 2. Subtract 76 from each side. So that would give us negative 74, which really means we have 74 negatively charged electrons. Mass number here would be 76 protons, plus 116 neutrons, so that would give us 192. And then finally we have here 80 as the number of protons. Look on the periodic table. Oh, actually one more thing, this would be osmium 2+. So we have 84 atomic number for the last column or last row, and that gives us h g, which is called mercury. Mass number would be number of protons, which is 80, plus number of neutrons, which is 120. So that's 200 for our mass number. And then finally to determine the overall charge at the end, we have 80 positive protons plus negative 78 for the 78 electrons. So that gives us overall a 2 plus charge. So this would be mercury 2+ion. So this is the approach you need to take in order to find out each one of the subatomic particles, net charge, and mass number for each of the given ions.

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Fill in the gaps for the following table.

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Ions (Simplified) practice set