Certain properties of Group VII elements, together with the explanations for these properties, are given. Which row correctly pairs a property with its reason?
- Aall the elements exist as diatomic molecules; each atom has seven electrons in the outer shell and can share a pair of electrons
- Bthe elements are classified as metals; when solid, the elements are shiny
- Ciodine displaces bromine from aqueous potassium bromide; bromine is more reactive than iodine
- Dthe boiling point increases as the group is descended; as the group is descended it becomes harder to break the covalent bond between the atoms