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Chemistry 18 Online
OpenStudy (anonymous):

Help anyone?

OpenStudy (kc_kennylau):

I can

OpenStudy (kc_kennylau):

Here is a stupid way for you to know how to do: So noble gas (except \(He\)) has an octet structure. As the name suggests, they are nobles. Everyone wanna be nobles. They'd lose electron or steal electron to be nobles (to have 8 electrons on the outermost occupied shell)

OpenStudy (kc_kennylau):

For group one, they'd give off 1 electron. Group two, 2. For group seven, they'd steal 1 electron to have 8 electrons. (remember the group number is indicating how many electrons it has in the outermost electron shell)

OpenStudy (kc_kennylau):

Which group is potassium in? And how many electrons will it give up/steal to become a noble? If so, what's its charge? (remember, electrons have a negative charge, so losing an electron would result in a potivie charge)

OpenStudy (kc_kennylau):

Welcome @UnkleRhaukus :D

OpenStudy (kc_kennylau):

Therefore how many electrons will it give off/steal?

OpenStudy (kc_kennylau):

exactly :D

OpenStudy (kc_kennylau):

so what's its charge?

OpenStudy (kc_kennylau):

yep :D

OpenStudy (kc_kennylau):

answer the same questions for oxygen and nitrogen

OpenStudy (kc_kennylau):

Nope, this is just the monoatomic part :)

OpenStudy (kc_kennylau):

It's a cation (+ve) or an anion (-ve)?

OpenStudy (kc_kennylau):

yep

OpenStudy (kc_kennylau):

if it's an anion, you change the ending to -ide.

OpenStudy (kc_kennylau):

Like the anion of hydr\(\underline{ogen}\) is hydr\(\underline{ide}\) ion.

OpenStudy (kc_kennylau):

yep :D

OpenStudy (kc_kennylau):

oh you use a different style of naming

OpenStudy (kc_kennylau):

oh yes

OpenStudy (kc_kennylau):

therefore it would be better for him to steal electrons than to give off

OpenStudy (kc_kennylau):

no it doesn't give off electrons :)

OpenStudy (kc_kennylau):

they wanna be nobles, who have 8 electrons.

OpenStudy (kc_kennylau):

so how many electrons must they steal?

OpenStudy (kc_kennylau):

oh sorry i meant outermost electron shell

OpenStudy (kc_kennylau):

and @nincompoop actually taught me a good way to teach people lol he taught me to use other examples, so here it goes. \(Al\) is in group three, so it must lose 3 electrons to become noble(stable octet), and therefore forms \(Al^{3+}\) ions. \(S\) is in group six, so it must steal 2 electrons to become noble(stable octet), and therefore forms \(S^{2-}\) ions. Two \(Al^{3+}\) atoms give off 6 electrons, which require three \(S^{2-}\) to receive, and therefore forms the compound \(Al_2S_3\)

OpenStudy (kc_kennylau):

Sorry I can't explain things well. @UnkleRhaukus and @derek11111 may be able to help you.

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