Draw the lewis dot diagram for the following atoms F He S

5 months agoany ideas on F? based on its location on the ptable how many valence electrons do you think it has? as a reminder these are neutral atoms, not ions

5 months ago7

5 months agoawesome, so you'd draw 7 electrons (3 pairs of 2, plus 1 leftover)

5 months agothoughts on helium?

5 months ago2

5 months agogood helium is a special case, it only has a 1s orbital so the electrons have to be paired up

5 months agothoughts on sulfur?

5 months ago6

5 months agogood sulfur follows the normal rule for pairing, fill up 4 electrons separately then pair up the last 2

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5 months agoCH4

5 months agoany ideas? have you tried adding up all the valance electrons for 1 carbon 4 hydrogens?

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5 months agoperfect

5 months agoBut isn't there dots

5 months agothere are no free electrons so there shouldn't be any

5 months agothis is a covalent compound so all the bonds involved shared electrons, represented by the lines

5 months agoSel2

5 months agothoughts? any attempts to add up the valence electrons?

5 months agowell, anyway, selenium has 4 valence e's and each iodine has 7, so 6 + 7 + 7 = 20, divide by 2 to get 10 electron pairs so set up your compound where Se is in the middle, and I is bonded to the left and right, and fill up enough lone pairs so that the whole compound has 10 electron pairs total

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5 months agothat's only five pairs, so you gotta fill up the iodine atoms completely to get 10 total pairs

5 months ago10 total pairs = 20 total electrons

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5 months agoalmost just one more bond on the first SeI

5 months agoalso when you make a double bond you have to erase an electron pair

5 months ago... wait

5 months agobut thats still 16 :(

5 months agooh, of course, selenium has an expanded octet so it can actually take more than 8, so put the last electrons on the selenium atom itself

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5 months agoI3^-

5 months agowell, each iodine gives 7, so 3*7, then you gotta add 1 because we have a -1 charge, so 22 electrons or 11 pairs

5 months agoas a hint this one only has single bonds

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5 months agoyeah that should be it, just two things 1. the pair of electrons on the right side shouldn't be in between the bond, they need to be off to the right side 2. since this is an ion you also need to draw a set of brackets around the whole thing, and write the charge at the top right

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5 months agoyup good

5 months ago