00:01
Okay, we are going to be identifying the symbol of elements described by the following coordinates or definitions as we see here.
00:11
So we're going to be looking first at group 5a or group 15.
00:15
So we'll just mark that here with the blue arrow.
00:18
Let's see.
00:19
Let me get that right.
00:21
So we have group 15 right here.
00:23
And then we're going to look for period two.
00:26
So that is this group here.
00:28
So that leaves us with nitrogen.
00:30
So element number seven, which is nitrogen.
00:34
We have an n.
00:36
And now we're going to be looking at a noble gas.
00:39
We know that the noble gases are located in row eight, sorry, column number 18, the final column.
00:49
And we're looking at period three.
00:52
So it's this here.
00:54
So that leaves us with element number 18, which is argon.
00:58
A .r.
01:00
Let me just write that like this, ar...