Question 1
Paper 2Easy5 marksBefore comparing simulations of Group 1 metals reacting with water and Group 17 elements reacting with halide ions, a chemistry class uses the periodic table to predict the properties of lithium, sodium, chlorine and bromine.
(a)[1]
State what is meant by periodicity.
(b)[2]
Explain why metallic character increases from lithium to sodium.
(c)[2]
Explain why non-metallic character decreases from chlorine to bromine.