Chemistry 5070 · O Level · Arrangement of elements
Arrangement of elements — practice question
The figure shows a section of the Periodic Table.
The following element symbols appear in approximately correct positions: Na, K, Ca, Sr, Ba, Cr, Fe, Ni, Zn, Ag, Al, Si, N, O, Cl.
Use only the symbols of the elements shown in the diagram to answer the questions below.
Each symbol may be used once, more than once or not at all.
State the symbol of the element that:
(a)[1]
acts as a catalyst during alkene hydrogenation.
(b)[1]
is obtained by electrolysis of its oxide dissolved in cryolite.
(c)[1]
is a metal found below copper in the reactivity series.
(d)[1]
is the gas used in welding.
(e)[1]
forms an ion carrying a charge of $-1$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Ni” …