00:01
All right, in this question we are talking about why metals are often found as ores or compounds as opposed to in their pure form.
00:08
So if we look at the periodic table, group 1a, group 2a, these are your alkali and alkaline earth metals, and then we have the transition metals over here.
00:20
Now, why do these not exist in their normal state? well, look at the number of valence electrons in these metals.
00:30
So lithium, for example, has just one valence electron.
00:36
That means it's looking to get rid of that electron, and it will be very reactive with other elements and compounds so that it can get rid of its electron.
00:48
It becomes stable.
00:52
Our atmosphere is full of oxygen and nitrogen, but we're going to use oxygen because it's more reactive.
01:01
So let's say we have something like magnesium...
