Skip to content

Course home

1.2 The periodic table

1.2 The periodic table

EasyMedium
1234567891011121314
Question 4

In 1869, Dmitri Mendeleev published his periodic table, arranging the elements known at the time.

a.

Tellurium (Te\text{Te}Te) has a relative atomic mass of 127.6, and iodine (I\text{I}I) has a relative atomic mass of 126.9. Explain why Mendeleev placed tellurium before iodine in his periodic table.

[1]
b.

Mendeleev left several gaps in his table for undiscovered elements, such as the gap below silicon which he named 'eka-silicon'. Explain how Mendeleev's predictions regarding these gaps led to the widespread acceptance of his periodic table.

[2]
c.

In the modern periodic table, elements are arranged in a different order compared to Mendeleev's table. State the property used to arrange elements in the modern periodic table.

[1]
Markscheme

1.2 The periodic table Questions

  1. GCSE
  2. /Chemistry
  3. /1.2 The periodic table

22 exam-style questions on AQA GCSE Chemistry 1.2 The periodic table, covering 1.2.1 The periodic table, 1.2.2 Development of the periodic table, 1.2.3 Metals and non-metals, 1.2.4 Group 0, 1.2.5 Group 1, and 1.2.6 Group 7. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank