The element symbols for Period 3 in the Periodic Table are listed below.
Na Mg Al Si P S Cl Ar
Use these elements to answer the questions that follow.
Each symbol may be chosen once, more than once, or not selected at all.
Write the symbol of the element that:
(a)[1]
produces a stable ion with a $2+$ charge.
(b)[1]
shows the lowest reactivity in the period.
(c)[1]
is used for treating water.
(d)[1]
forms an oxide that is the chief impurity in iron ore.
(e)[1]
is a key ingredient of fertilisers.
(f)[1]
is kept under oil.
(g)[1]
is used to make food containers.
(h)[1]
is present in the ore zinc blende.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Mg” …