Periodic table trends

Question 1

atomic radius (across)

Answer 1

decreases (effective nuclear charge increases, gets smaller)

Question 2

atomic radius (down)

Answer 2

increases (more e shells, gets bigger)

Question 3

first ionization energy (across)

Answer 3

increases (closer to nucleus, harder to remove)

Question 4

first ionization energy (down)

Answer 4

decreases (farther from nucleus, easier to remove)

Question 5

electron affinity (across)

Answer 5

increases (wants to fill valence shell)

Question 6

electron affinity (down)

Answer 6

decreases (orbitals are farther out)

Question 7

electronegativity (across)

Answer 7

increases (wants to fill valence shell, electron hog)

Question 8

electronegativity (down)

Answer 8

decreases (orbitals are farther out, doesn’t hog electrons)

Question 9

effective nuclear charge (across)

Answer 9

increases (more protons, same shielding)

Question 10

effective nuclear charge (down)

Answer 10

decreases (more protons, but much more shielding)

Question 11

shielding by electrons (across)

Answer 11

constant (e in the same shell don’t shield each other)

Question 12

shielding by electrons (down)

Answer 12

increases (additional inner e shells increase shielding)

Question 13

size: atom vs. ion

Answer 13

cations (+) are always smaller, anions (-) are always bigger