A student writes three statements to explain the trend in reactivity in group 1.
Statement 1: down the group the outer electron is further from the nucleus and more shielded by inner shells, even though the nuclear charge increases
Statement 2: caesium is more reactive than sodium because a caesium atom has more electrons that it can lose
Statement 3: lithium reacts least vigorously because its outer electron is attracted most strongly by its nucleus
Which statements are correct?
1 and 3 only
1 only
2 and 3 only
1, 2 and 3
75 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.