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Naming Ionic Compounds

Added Sep 05, 2014 •

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the title today is naming ionic compounds and so we are going do is if we see a formula of an ionic compound how do we name that thing what is it called I'm so keep in mind we're talking about ionic thanks that means metals non-metals recognize an ionic compound because you have a metal cation and an nonmetal and ion you need to take out your periodic table out of its page protector and we are going to talk about elements that have Dependable ionic charges so we are not talking countable meaning they only have one ionic charge  so  I want you to go ahead and  I make a Google  with group number and charge  on the table that we will be making in our nose what I'm referring to group one I'm referring to this group here group 1A group 2A 4A 5A 6A 7A  you should the transition metals an actinide series they do not have group one when elements in group 1 form ions does always have a positive one charge so when elements in group 1 become an ion one valence electron when elements in group 2 coming on Ion they always become an ion with a positive 2 charge 3 + 3 for can go either way they can either be an ion with positive for charger negative Court 5  elements in group 5 when they form ions with always have a negative charge  6 News two  781 and Ruby are the noble gases that you never appear we're going to say positive one  this matter I know that I transfer transfer step positive to charge  positive 3 positive for negative 4 please don't worry right now about how you're going to know which is -3  need to -1 never forms ionic compounds have the overall positive charge of the cation has to be equal to the overall negative charge of the anion it is electric. fraction that is holding these things together and so positive the magnitude of Paws bus to the magnet are electrically so here we have two compounds NaCl + cacl2 Harry name is two things what are they called  and why is it this compound only has one chlorine ion and this compound has two chlorine ions by let's find out whenever we're naming an ionic compound the cation always comes first an ion always come second in the name how do I is named exactly the same as the element  so if we look at these two these two compounds have to be okay and being able to recognize what is the cation the cation is going to have positive charge and dads the metal sodium is the cation calcium is the cation so they are named the same as the element so for instance we would say simply that for this compound because the cation is a sodium ion how do I know the one charge well I just wrote it on my periodic table we don't so sorry about positive one charge it is cation was it called sodium calcium is also of a compound it has positive 2 charge  going to get that off of periodic table when it's an Ohio we simply call it calcium Ariana's little bit different family in the Same by taking the first syllable full of the element name  and then hi  remember the Anna ion is going to be the nonmetal going to help the negative charge chloride K chlorine is an anion with an 8-1 charge me just enough garden table  core and then we add a i  this is an oxygen ion to charge ox  Hodge how do I charge cuz NaCl sodium chloride cacl2 is calcium chloride now let's go back to this other question about  why is calcium chloride have two chlorines  sodium chloride only has one the answer is coming from the fact that ionic compounds must be electrically neutral sodium has a positive one chloride has a negative one  calcium cause positive 2 in order balance. Pasta too because chloride only has a negative one we need to have two chlorides balance a positive 2  overall chart shared pics of two times negative one is going to end up have this thing this kno3 when naming ionic compounds it's important that first of all we recognize what is the cation turn trick our positively-charged Scott is going to be the potassium and are negatively charged and on it's going to be this polyatomic ion nitrate so we have to be able to pick out the polyatomic anions and that's the reason why we memorizing them because she's going to make this single hole lot easier so in this case we're just going to keep the same name for the cation that's what we always do it's going to be pushed off but Koozie and ion is Rapier nitrates we're going to call this thing nitrate  so what's the polyatomic anions we just called them by the name that we've alright the last one challenge as well not so straightforward so it's look for our are cation and anion  shark Posh charge it's going to be the metal that is going to be to The Copper is Kion and the ox nonmetal yeah so it looks like this might be kind of easy  copper this isn't descriptive enough okay yeah cuz this is trailer all monatomic anion it doesn't have snow oxygen we're going to take its first over now. Moxa this isn't descriptive enough why isn't it descriptive enough cuz we know the copper comes in two forms copper 1 Copper 2 so when we're naming  compounds that have trans have more than one charge we have to say Which ion a copper it is is a copper 1 or copper 2 so how we going to figure that out when we are going to have to work backwards  we're going to have to go with me say to ourselves well  oxide always has a negative I have one oxygen and I have one popper this is an electric all ionic compounds are electrically neutral from Nation have one of these for every one of these  that means. If this overall -2 what must this silver must be a positive so that means that our compound is going to be copper talk to us  we're going to have lots of crap

Uploaded by Lisa Graham.

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Naming Ionic Compounds

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