00:01
We are asked to give the properties of three different groups.
00:06
And let me write the groups down.
00:07
First group are alkali metals.
00:16
The second group are the noble gases.
00:23
And the third group are the halogens.
00:31
And i'm just going to write properties in like this.
00:37
First, alkali metals.
00:40
These are soft, silver, highly reactive, don't exist in nature, uncombined.
01:08
What else? i wonder if i should write that they're metals.
01:11
It says they're metals.
01:13
One, two, three.
01:15
Oh, i suppose they have a pretty low melting point, and that should be good with them.
01:28
Noble gases.
01:30
Oh, i should also, just as a general, they're in group 1a on the periodic table.
01:36
The noble gases are in the far right group, and i'm going to call them 8a...
