Chemistry 5070 · O Level · Atomic structure and the Periodic Table
Atomic structure and the Periodic Table — practice question
Fig. 1.1 presents the electronic configurations of five atoms, D, E, F, G and H.
Use these configurations to answer the questions.
Any configuration may be chosen once, more than once or not at all.
State which electronic configuration, D, E, F, G or H, represents:
(a(i))[1]
an atom from an element in Group VI of the Periodic Table
(a(ii))[1]
an atom that forms an ion giving a lilac colour in a flame test
(a(iii))[1]
an atom belonging to a monatomic gas
(a(iv))[1]
an atom of an element used in the treatment of the domestic water supply to remove tastes and odours
(a(v))[1]
an atom that forms a stable ion by giving up two electrons
(b)[2]
Determine the numbers of protons and neutrons in the chromium atom shown, $^{53}_{24}\text{Cr}$.
number of protons
number of neutrons
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “G is the correct option” …