We learned about periodic trends, trends in ion size, trends in ionization energy, trends in electron affinity, and trends in electronegativity. The trends in atomic size is as you move down a group, the atoms tend to get larger. The trends in ionic size is that when an atom forms a cation, it will lose electrons. The trends in ionization energy is that the energy needed to remove an electron from a gaseous atom is known as the ionization energy. The trends in electron affinity is that noble gases have the lowest amount of energy to add an electron because you can't add an electron to something that already has all the valence shells filled, and that the trend goes up and to the right; it's different because on graphs the numbers are labeled as negative, but that's only because the the energy that has been given off. Finally the trends in electronegativity is the tendency of an atom to draw electrons toward itself when chemically combined with another element.
I thought this was a very nice summary of the lesson. It wasn't the easiest lesson to me, but then again, not the easiest class.
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