Skip to content

Course home

1.2 The periodic table

1.2 The periodic table

EasyMedium
1234567891011121314
Question 5
a.

The atomic weight of tellurium (Te\text{Te}Te) is 128128128 and store of iodine (I\text{I}I) is 127127127. Even though iodine has a lower atomic weight, Mendeleev placed tellurium before iodine in his periodic table.

Explain why Mendeleev reversed the order of these two elements.

[2]
b.

Mendeleev left empty spaces in his periodic table.

Explain why leaving these spaces made his table more widely accepted after several years.

[3]
c.

Tennessine (Ts\text{Ts}Ts) is located at the absolute bottom of Group 7, directly below astatine (At\text{At}At) in the modern periodic table.

Predict:

  1. The chemical formula of a tennessine molecule.
  2. The state of matter of tennessine at room temperature (20∘C20^\circ\text{C}20∘C).
[2]
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