How to start of my science introduction about the history of matter?

One does not belong why? ice, gold ,wood ,diamond and table salt

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?