Gold reacts with the elements in Group 7 of the periodic table.0.175 g of gold reacts with chlorine. The equation for the reaction is:2 Au + 3 Cl2→ 2 AuCl3 Calculate the mass of chlorine needed to react with 0.175 g of gold. Give your answer in mgRelative atomic masses (Ar): Cl = 35.5 Au = 197 [5 marks]Mass of chlorine=mgTurn over for the next question

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

it is stable as it is in group 0 which have full outer shells of electrons