Chemistry 0620 · IGCSE · Atomic structure and the Periodic Table
Atomic structure and the Periodic Table — practice question
The electronic structures for five atoms, A, B, C, D and E, are shown. Use these structures to answer the questions that follow. Each structure may be chosen once, more than once, or not at all. State which of A, B, C, D or E represents:
(a(i))[1]
an atom of a metallic element.
(a(ii))[1]
an atom whose proton number is 13.
(a(iii))[1]
an atom belonging to phosphorus.
(a(iv))[1]
an atom with electrons in only two shells.
(a(v))[1]
an atom that forms a stable ion with one negative charge.
(b)[3]
Fill in the table with the numbers of electrons, neutrons and protons for the carbon atom and potassium ion shown.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Option C” …