00:01
So this question is an exercise in reading and interpreting the periodic table.
00:06
This is a snippet of the right -hand side of the periodic table, and you notice that there are some column headers, 3a, 4a, 5a, 6a, and so on.
00:15
Now, these column headers, the way you interpret them, is that everything in this column is grouped underneath this column header.
00:23
So, for example, boron, aluminum, and gallium are all part of group 3a, carbon, silicon, and germanium are all part of group 4a.
00:35
And so the first part of the question is, knowing this is quite simple.
00:41
What group is carbon in? carbon over here is part of group 4a.
00:46
And the second part of the question is how many valence electrons that carbon has.
00:52
And so the way you go about that is the number in the group name, in this case 4, represents the number of valence electrons.
01:02
So carbon has four valence electrons because it is part of group 4a...