Course home

2.2 The periodic table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Question 31

Table 1: First ionisation energies of selected Period 4 elements

Symbol	Atomic number	First ionisation energy in $mol−1\text{kJ}\ \text{mol}^{-1}$
K	19	419
Ca	20	590
Ga	31	579
Ge	32	762
As	33	947
Se	34	941
Br	35	1140

Using your Periodic Table, give the relative atomic mass of selenium.

[1]

Markscheme

2.2 The periodic table Questions

GCSE
Chemistry
2.2 The periodic table

80 exam-style questions on Edexcel GCSE Chemistry 2.2 The periodic table, covering 2.2.1 Mendeleev's periodic table, 2.2.2 Periods, groups, metals and non-metals, and 2.2.3 Electronic configuration and position in the periodic table. Each one has a worked solution and a mark scheme showing where the marks go.

2.2 The periodic table

Question bank

2.2 The periodic table

Easy Medium Hard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Question 31

Table 1: First ionisation energies of selected Period 4 elements

Symbol	Atomic number	First ionisation energy in $mol−1\text{kJ}\ \text{mol}^{-1}$
K	19	419
Ca	20	590
Ga	31	579
Ge	32	762
As	33	947
Se	34	941
Br	35	1140

Using your Periodic Table, give the relative atomic mass of selenium.

[1]

Markscheme

2.2 The periodic table Questions

GCSE
Chemistry
2.2 The periodic table