00:01
Okay, so i have drew some different nuclei for you.
00:10
The red represents a proton and the black is a neutron.
00:15
So looking at these different structures, let's identify the atomic symbol for each of them.
00:22
So what atom each nucleus is representing, and then we can figure out which one are isotopes.
00:28
So this you'll need a periodic table.
00:34
And the element is always determined by the number of protons.
00:38
So if we look at structure a, we can see that there are four protons.
00:45
So if you go to the periodic table and look at the atomic number of four, we can see that beryllium is the one that has four protons.
00:59
So borrelia, b -e, is for a.
01:04
Okay, now let's go to the next one...