Periodic Trends

Question 1

periodic law

Answer 1

the physical and chemical properties are a periodic function of their atomic number

Question 2

what is the trend of effective nuclear charge

Answer 2

increases across a period, decreases down a group

Question 3

what is the trend of atomic radii

Answer 3

decreases across a period, increases down groups

Question 4

ionization energy trend

Answer 4

increases across a period
decreases down a group

Question 5

electron affinity trend

Answer 5

increases across a period
decreases down a group

Question 6

electronegativity trend

Answer 6

increases across a period
decreases down a group

Question 7

oxidation number trend

Answer 7

increases until the staircase, then decreases
stays the same down a group

Question 8

density trend

Answer 8

increases in the middle of a period
increases down groups

Question 9

atomic radii

Answer 9

size of an atom

Question 10

electron affinity

Answer 10

the energy change associated with gaining an electron

Question 11

effective nuclear charge

Answer 11

amount of positive charge felt by an electron

Question 12

electronegativity

Answer 12

a measure of the ability of an atom to attract electrons from another atom in the compound

Question 13

ionization energy

Answer 13

energy required to remove one electron from a neutral atom

Question 14

oxidation number

Answer 14

the charge on an atom after making a full outer shell