The periodic trend of chemical reactivity for alkali metals and halogens is described in the following statements. Which statement provides the correct concept?
- AReactivity decreases in alkali metals,but it increases in halogens with an increase in atomic number down the group.
- BReactivity decreases in both alkali metals and halogens with an increase in atomic number down the group.
- CReactivity increases in both alkali metals and halogens with an increase in atomic number down the group.
- DReactivity increases in alkali metals,but it decreases in halogens with an increase in atomic number down the group.
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