Compounds

Question 1

what is the definition of a compound?

Answer 1

a compound is a substance containing more than one type of atom, chemically bonded together

Question 2

how can you form compounds?

Answer 2

by heating their elements together

Question 3

what are the three types of compound?

Answer 3

• metallic (metal)
• ionic (metal + non-metal)
• covalent (non-metal)

Question 4

describe the ammonium chloride tube practical

Answer 4

• two gases, ammonia and hydrogen chloride diffuse from the ends of the sealed tube
• where they meet, the compound ammonium chloride forms as a white smoke
• this shows that the hydrogen chloride molecules must be heavier, as they diffused slower

Question 5

what is the word equation for the ammonium chloride in a tube practical?

Answer 5

ammonia + hydrogen chloride -> ammonium chloride

Question 6

what happens if you heat up the tube, in the ammonium chloride tube practical?

Answer 6

• if you heat up the tube, the white smoke forms faster because the particles move faster and collide more often
• it still forms in the same place because both gases diffuse faster