Chemistry Past Questions and Answers

An element X has 127 neutrons and 82 electrons.
Its atomic number is?

An element X has 127 neutrons and 82 electrons.
Its atomic number is?

When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?

When glowing splint is inserted into the mouth of a jar containing a gas, the splint is extinguished. The gas gives a white precipitate when passing into barium hydroxide. The gas is?

An example of a strong electrolyte is?