Elements, molecules and compounds

This task is about atoms, elements, molecules and compounds.

Question

diagram with atoms, compounds, elements and molecules
a)
In the diagram above, each circle represents one atom. Which row of the table shows the correct number of atoms, molecules, elements and compounds represented in the diagram?
 
   atom(s) molecule(s) element(s) compound(s)
Row A 1 1 1 3
Row B 1 3 2 1
Row C 8 1 3 1
Row D 8 3 3 1

    • Row A

    • Row B

    • Row C

    • Row D

Question

b)  Chloroform has the formula CHCl3. It contains carbon (C), hydrogen (H), and chorine (Cl).
     How many atoms are there in one molecule of CHCl3?

    • 3

    • 4

    • 5

    • 6

    • 9

Question

c)  Methanol has the formula CH3OH. It contains carbon (C), hydrogen (H), and oxygen (O).
   carbon hydrogen oxygen
Row A 3 4 1
Row B 3 3 1
 Row C 1 4 1
 Row D 1 4 3
Row E 1 3 1
     Which row in the table shows how many of each type of atom there are in one molecule of CH3OH?

    • Row A

    • Row B

    • Row C

    • Row D

    • Row E