Why does increased shielding down Group 1 affect reactivity?
It makes the atoms smaller, so electrons are held tighter
It increases the number of electrons in the outer shell
It increases the nuclear charge felt by the outer electron
It weakens the nucleus's attraction for the outer electron
41 exam-style questions on Edexcel GCSE Chemistry 7.1 Group 1, covering 7.1.1 Classifying elements by group in the periodic table and 7.1.2 Properties and reactions of the alkali metals. Each one has a worked solution and a mark scheme showing where the marks go.