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Chemistry Videos 44 videos

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Chemistry: 6.1 Lewis Dot Structures 103 Views


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Description:

Today we're learning all about diagrams that tell us how many valence electrons an element has. Just remember not to go judging an element by its valence electrons. It's what's inside that counts.

Language:
English Language

Transcript

00:03

There comes a time in every

00:05

young element's life when they must make [Elements appear together]

00:07

the biggest step of all: getting their

00:10

Lewis dot license. The day an element

00:13

finally gets it dot is always an [Hydrogen element with it's Mom and Dad]

00:15

exciting one. After all, these dots will

00:17

indicate to the world just how many

00:19

valence electrons each element has in [Lewist dot diagram of an element]

00:21

his valence shell, which can be a little

00:24

embarrassing too, but the thrill of

00:26

showing off one's dot more than makes up

00:28

for the mild humiliation there. Today,

00:30

lithium, nitrogen, and neon have made [Lithium, nitrogen and neon sitting outside a room]

00:33

their way to the DLD--the Department of

00:35

Lewis Dot--and are eagerly awaiting their

00:38

big moment.

00:39

Neon finally gets her number called, and [Neon walks through door]

00:41

after taking a brief test and having an

00:43

awful photo taken, she was awarded

00:45

with eight bright shiny dots: two above, two to [Neon with 8 dots]

00:49

the right two below, and two to the left. Now

00:51

everyone Neon bumps into will know that she's [People bumping into Neon on the street]

00:54

got two electrons in each of her four

00:56

orbitals. Well, they'll also know that

00:58

she's in group eight on the periodic

01:00

table, since the number of valence

01:02

electrons is always equal to an element's

01:04

group number. Her chances of getting

01:06

asked to homecoming this just went way up.[Boys asking Neon to homecoming]

01:09

Nitrogen is next to go, and while he

01:11

isn't giving as many dots as neon, he's

01:14

still awfully pleased with his five [Nitrogen with 5 dots]

01:16

brand-spanking-new dots. He's got one on

01:19

each of three sides and two dots on the

01:21

fourth side because of course an element

01:24

has to get one dot on each side before

01:26

any doubling can take place. So yeah,

01:29

three of his orbitals are short an [Finger points to nitrogen's orbitals]

01:31

electron, but well, his best years

01:33

are still ahead of him. And he's planning to major in

01:36

electron acquisition in college so... After [Elements sitting in a classroom]

01:39

about six hours, once most of the

01:40

excitement is drained from the room, Lithium

01:43

finally has his number called. He is

01:45

suddenly filled with renewed vigor and [Lithium bouncing up and down]

01:47

anticipation until he's given a single

01:50

lonely dot, which represents the lone

01:52

electron in his valence shell. He's happy [Electron in lithium's valence shell]

01:55

to have finally performed this rite of

01:57

passage, but the next couple of years are

01:59

probably going to be tough for him. [Elements chasing lithium in a field]

02:01

Transition metals can be so cruel

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