Explain why the reactivity of Group 2 elements increases down the group.
Moving down Group 2, the atomic radius increases as there are more electron shells. This also means that the outermost electrons are more shielded from the positive charge of the nucleus. This decreases the attraction between the nucleus and outer electrons, and therefore less energy is required to remove the outer electron in a reaction.
JC
Related Chemistry A Level answers
All answers ▸Chlorine, 15 g, is contained in a vessel with a volume of 0.80 dm3 at 330 K. Calculate the pressure exerted when the chlorine is treated as a perfect (ideal) gas giving your answer in terms of kPa
Discuss the reactivity benzene, chlorobenzene, toluene and phenol in electrophillic aromatic substitution
At 25 °C, the initial rate of reaction is 3.1 × 10−3 mol dm−3 s−1 when the initial concentration of C is 0.48 mol dm−3 and the initial concentration of D is 0.23 mol dm−3 . Calculate a value for the rate constant at this T when rate = k [C][D].
Why do branch chained isomers have lower boiling point than straight chain equivalents?