0:02 in this video we're going to start
0:05 taking a look at the periodic table so
0:08 we need to start by really understanding
0:10 some of the terminology that we use when
0:13 we talk about the periodic table
0:16 let's start off with first group
0:20 so groups are written all along the top
0:23 of the periodic table here and a group
0:27 refers to a column
0:30 so a column is equal to a group
0:33 and we usually use the numbers that are
0:36 related to the different columns in the
0:38 periodic table so we have group one
0:42 which are these elements all down here
0:45 and group two are all of these ones here
0:49 and so on and so forth all the way up to
0:50 group 18.
0:53 now sometimes with groups and we'll see
0:56 why in later lessons
0:59 but Group 13 is also called group three
1:02 or group 14 is also called group four
1:06 and five six seven and eight so
1:08 depending on the periodic table you're
1:11 looking at it could be referred to for
1:13 these last set of groups here either the
1:17 group by the single digit or the one
1:21 with the 10 factor in front of it
1:24 so just something worth keeping in mind
1:27 when we talk about group number
1:30 the next term we need is period so
1:33 period numbers are listed along the side
1:37 here and there are seven periods where a
1:41 period is also a row in the periodic table
1:42 table
1:45 so there are seven periods in this
1:46 periodic table
1:50 so all of these elements hydrogen helium
1:52 are in Period one
1:54 in Period two we have all of these
1:58 elements and so on all the way down to
2:04 now when we also take a look at our
2:08 periodic table we can see that some of
2:11 the elements are in yellow some are in
2:13 green and some are in red
2:17 all of the elements that are in yellow
2:24 okay so all of the yellow ones are metals
2:27 metals
2:30 all of the elements that are listed in red
2:43 and then we have this last group here
2:45 that are in green and all of the
2:47 elements that are in green
2:49 are called
2:53 metalloids metalloids
2:56 okay so that includes Boron silicon germanium
2:58 germanium
3:04 um as SB and nte so
3:07 um they're all sort of seven there and
3:10 they sit on this Jagged line
3:13 between which the periodic table is
3:18 divided into metals and non-metals okay
3:21 now the reason they're called metalloids
3:23 is because they have properties of both
3:25 metals and non-metals and we'll see some
3:30 examples of those later on in the course
3:33 all right the last thing we want to
3:35 notice and recognize about this periodic table
3:36 table
3:39 is that some of the elements are written
3:41 in Black some are written in blue and
3:43 some are written in red
3:45 and this actually tells us you can see
3:48 this in our periodic table in our
3:50 classroom or on most periodic tables
3:52 like this if they're printed in color
3:56 if an element's black written in Black writing
3:57 writing
4:00 which is most of the metals here as well
4:04 as a couple of the non-metals
4:09 like here then they are solid at room temperature
4:15 and so when I say room temperature
4:17 usually when we talk about room
4:19 temperature and science we talk about 25
4:22 degrees Celsius
4:26 all of the elements listed in red and
4:28 there are only two here Mercury and bromine
4:30 bromine
4:32 so the red ones
4:36 are liquid at room temperature
4:39 so Mercury and bromine are both liquids
4:41 at room temperature
4:44 and then finally the ones that are listed
4:45 listed in
4:47 in blue
5:00 and so that is most of our non-metals
5:03 over on this side here not all of them
5:05 are going to be gases at room
5:09 temperature but quite a few of them are
5:14 okay that's it for this video let's move
