Answer
Please see the work below.
Work Step by Step
Mg- is a shiny grey solid under atmospheric conditions. It exists as single atoms in elemental form.
Cl- is a greenish-yellow gas under atmospheric conditions. It exists as a diatomic gas.
Si - It is a blue-grey metallic solid under atmospheric conditions. It exists as a three-dimensional network of atoms in elemental form.
Kr – It is a colorless gas under atmospheric conditions. It exists as a monoatomic gas.
O – It is a colorless gas under atmospheric conditions. It exists as a diatomic gas.
I – it is a black solid under atmospheric conditions. It exists as a diatomic molecule.
Hg – It is a shiny silvery liquid under atmospheric conditions. It exists as single atoms in elemental form
Br – is a fuming red-brown liquid under atmospheric conditions. It exists as a diatomic molecule.
