Describe how the plum pudding model of the atom was replaced by the nuclear model.
From Chemistry Paper 1, Higher
24 marks
Explain why the reactivity of Group 1 metals increases down the group.
From Chemistry Paper 1, Higher
93 marks
An atom of potassium has mass number 39 and atomic number 19. Give the numbers of protons, neutrons and electrons.
From Chemistry Paper 1, Higher
103 marks
Describe what you would see when potassium is added to water and write a balanced equation.
From Chemistry Paper 1, Higher
172 marks
An element has two isotopes: mass 35 (75%) and mass 37 (25%). Calculate its relative atomic mass.
From Chemistry Paper 1, Higher
184 marks
Explain why chlorine displaces bromine from potassium bromide solution and write an ionic equation.
Score 0 / 19 · 0 of 6 marked
This paper is written by Plasmo in the style of the AQA GCSE Combined Science exam. It is not a past paper and is not produced or endorsed by the exam board.