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Covalent bonding happens when two molecules share a pair of electrons. For example in hydrogen chloride (HCl). Ionic bonding is when two oppositely charged ions are attracted to each other to form a la...

Due to the delocalisation of electrons in the benzene ring conferring more stability on the structure.

Answer: water, followed by hydrogen fluroide, ammonia and lowest is methane.

Explanation: First it helps to write the molecular formulae of these molecules and know their shape:

As group 2 in the periodic table comprises of metals, the reactivity of group 2 elements towards chlorine increases when working our way down the group 2 metals. This is compared to non-metals when the...

Crude oil is seperated using a method called fractional distillation. The hydrocarbons that make up crude oil have different boiling points, so when the crude oil is heated, each compound evaporates at...