00:01
This question asks about the size of the atoms and irons.
00:09
To answer this question or understand this problem, we first need to know what determines the size of the irons and atoms.
00:19
For atoms or irons, we can actually regard them as a positive nuclear, surrounded by a negative -charged electrons.
00:31
So if the attractive force between the nucleus and electrons is larger, then the radius of the atoms will be smaller.
00:49
Be sure to remember that.
00:51
Now we can go back to the question.
00:55
This question asks about the size of these four different ions or atoms.
01:01
And those four different atoms or irons has one common feature, which is they actually have the same amount of outer electrons in the orbital, which is 18.
01:23
Now, right, as i mentioned earlier, the larger of the attractive force, the smaller of radius.
01:32
Now we only need to compare with the amount of the positive charge of those irons, then we can know the size of the atoms and atoms...