EL 4 - Organising the elements of life

Question 1

Describe Mendeleev’s periodic table

Answer 1

Mendeleev arranged elements in order of increasing atomic mass.
Elements with similar properties were in the same vertical group.
He left gaps and they corresponded to his predictions of elements that had not been discovered at the time.
(Also made predictions about the properties of undiscovered elements e.g germanium)

Question 2

What is periodicity?

Answer 2

The occurrence of periodic patterns or trends

Question 3

Name the four blocks in the periodic table and label them

Answer 3

s (group 1 and two), d (block between group 2 and 3), p (group 3-0) and f (block along the bottom)

Question 4

What ions do group 1 elements form?

Answer 4

1+ ions

Question 5

What ions do group 2 elements form?

Answer 5

2+ ions

Question 6

What ions do group 7 elements form?

Answer 6

1- ions

Question 7

What ions do group 6 elements form?

Answer 7

2- ions

Question 8

What ion does aluminium form?

Answer 8

3+ ions

Question 9

What is the pattern that you can use to write electron configurations using the periodic table?

Answer 9

Period 1,2,3,4,5 etc. for s block: 1s, 2s, 3s, 4s, 5s
Period 1,2,3,4,5 etc. for p block: 1p, 2p, 3p, 4p, 5p
Period 4,5,6,7 for d block: 3d, 4d, 5d, 6d, 7d