C2 - Atoms, Elements and Compounds - Revision

Q1. Which option correctly describes the relative charges and masses of the subatomic particles?

• A
• B
• C
• D

Q2. The atomic number of element Q is 9 and its mass number is 19. In which group of the Periodic Table should element Q be placed?

• Group I
• Group II
• Group VII
• Group VIII
• D

Q3. The diagram shows the atomic structure of an element. Which element is it?

• Carbon
• Beryllium
• Oxygen
• Boron

Q4. The atomic structure of atoms Q, R, S and T are shown in the table. Which two atoms are isotopes?

• Q and S
• Q and T
• R and T
• R and S

Q5. Substances can be broadly classified into three categories which are elements, compounds and mixtures. Which of the following statements is correct?

• Elements contain different atoms
• Compounds consist of elements that are not chemically combined
• Mixtures consist of elements that are chemically combined
• A mixture can contain elements and compounds

Q6. The structure of four particles is described in the table. What are the correct values for X, Y and Z?

• X = 4, Y = 7, Z = 9
• X = 3, Y = 9, Z = 9
• X = 4, Y = 9, Z = 10
• X = 3, Y = 7, Z = 10

Q7. Element X contains 12 of each sub-atomic particle. What is the correct Group number for element X?

• Group I
• Group II
• Group VII
• Group VIII

Q8. Element X contains 4 electrons in its outer shell and 125 neutrons in its nucleus. What is element X?

• Carbon
• Beryllium
• Tin
• Lead

Q9. Potassium fluoride is an ionic compound formed when one atom of potassium bonds with one atom of fluorine. Which row correctly describes the charge and electronic configuration of each ion in the compound?

• A
• B
• C
• D

Q10. A section of the Periodic Table is shown below. The electronic structure of elements W, X, Y and Z are shown in the table. Which elements have the correct electronic structure?

• W and X
• Y and Z
• W and Y
• X and Z