Chemistry · May / June 2023 · Paper 12 · Question 10

The diagram shows the structures of the atoms of two elements, X and Z. X and Z are not the atomic symbols for these elements. [diagram: atom X with nucleus 3p 4n and electron shells with 2 and 1 electrons; atom Z with nucleus 8p 8n and electron shells with 2, 6 electrons; key: p = proton, n = neutron, e = electron] The elements combine to form a compound. What is the mass of one mole of this compound?

1. A11 g
2. B12 g
3. C23 g
4. D30 g

As printed in the paper