3.2.1. Periodicity

Question 1

What are groups in the periodic table?

Answer 1

Vertical columns

Question 2

What are periods in the periodic table?

Answer 2

Horizontal rows

Question 3

Which block are transition metals in?

Answer 3

Transition metals - D block

Question 4

What are the maximum number of electrons that can be held in the d energy level?

Answer 4

d = max of electrons. 10

Question 5

What are the maximum number of electrons that can be held in the s energy level?

Answer 5

s = max of electrons. 2

Question 6

What are the maximum number of electrons that can be held in the p energy level?

Answer 6

p = max of electrons. 6

Question 7

What are the maximum number of electrons that can be held in the f energy level?

Answer 7

f = max of electrons. 6

Question 8

How is an element placed in the periodic table?

Answer 8

Placement determined by the proton mumber

Question 9

Along period 3, how does the atomic radii change?

Answer 9

Atomic radii decreases from Na-Ar

Question 10

Along period 3, why does the atomic radii change?

Answer 10

Decreases across period 3:

• More protons
• Same amount of shielding
• Greater forces of attraction between nucleus and negative electrons

Question 11

What is ionisation energy?

Answer 11

Ionisation energy is the amount of energy needed to remove 1 electron from 1 gaseous atom

Question 12

How does ionisation energy change from Na (3s1) to Mg (3s2) and why?

Answer 12

Ionisation energy increases:

• More protons
• Same orbital
• More forces of attractionw