Periodic Trends

Question 1

Nuclear Charge (table of elements)

Answer 1

Across: increasing Down: none

Question 2

Ionization Energy (table of elements)

Answer 2

Across: increasing Down: decreasing

Question 3

Ionic Radius (table of elements)

Answer 3

Across: decrease; increase/decrease Down: increase

Question 4

Atomic Radius (table of elements)

Answer 4

Across: decrease Down: increase

Question 5

Shielding (table of contents)

Answer 5

Across: stays the same Down: increase

Question 6

Electronegativity (table of contents)

Answer 6

Across: increase Down: decrease

Question 7

Nuclear Charge (reason for trend)

Answer 7

Across: protons are increasing which causes positive charge to increase Down: quantum level does not affect it because it does not display periodicity

Question 8

Ionization Energy (reason for trend)

Answer 8

Across: more positive charge increases pull on electrons therefore it takes more energy to steal one Down: it gains quantum levels therefore the pull from the nucleus isn’t as strong

Question 9

Ionic Radius (reason for trend)

Answer 9

Across: losing more electrons ->it gets smaller, gaining more electrons -> it gets bigger; moving across, fewer are gained Down: more quantum levels cause increase in size

Question 10

Atomic Radius (reason for trend)

Answer 10

Across: protons increase, pulling the electrons in closer making it smaller Down: quantum levels increase causing it to get bigger because of the electron shells

Question 11

Shielding (reason for trend)

Answer 11

Across: no change because quantum levels do not change across a period Down: increases because as you go down quantum levels are added, known as shielding

Question 12

Electronegativity (reason for trend)

Answer 12

Across: the increase in positive charge pulls the electrons more strongly Down: as you go down quantum levels are added which makes in more difficult to pull the electrons because of the electron shells around it