Periodic Trends
Atomic Radius
As we go across the Periodic Table, the atomic radius is getting smaller because we are adding protons and neutrons which pull in the electrons closer.
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As we go down the Periodic Table, the atomic radius gets bigger because every period we go down, we are adding a ring.
Electron Affinity
As we go across the Periodic Table, it increases because Electron Affinity is the ability of an atom to hold an extra electron; and going across is increasing the amount of protons and neutrons which pulls in more electrons and adds valance electrons.
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As we go down the Periodic Table, it decreases because going down the Periodic Table means the atoms are adding protons and neutrons and the valance electron stays the same.
Ionization Energy
As we go across the Periodic Table, it increases because Ionization Energy is the the energy needed to remove an electron and the electrons are farther from the nucleus and easier to remove.
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As we go down the Periodic Table, it decreases because the electrons we are trying to remove are closer to the nucleus.
Electronegativity
Electronegativity is a measure of an atom's attraction for another atom's electrons. So as we go across the Periodic Table, it increases because as the radius decreases, electrons get closer to the atom's nucleus,
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As we go down the Periodic Table, it decreases because the radius gets bigger which makes the electrons farther away from the nucleus.
Reactivity
Metals- Going down increases because its easier for its electrons to be given away.
- Going across decreases
Non-Metals are opposite
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