Chemistry 0620 · IGCSE · Isotopes

Isotopes — practice question

Silver’s atomic number is 47.
(a(i))[1]

State the term used for atoms of one element that have different nucleon numbers.

(a(ii))[3]

Complete the table to show how many protons, neutrons and electrons are present in each silver atom and ion shown.

(a(iii))[3]

Complete this definition of relative atomic mass. Relative atomic mass is the [BLANK] mass of naturally occurring atoms of an element on a scale where the [BLANK] atom has a mass of exactly [BLANK] units.

(a(iv))[1]

A silver sample has a relative atomic mass of 108.0. Deduce the percentage of $^{107}\text{Ag}$ in this silver sample.

(b)[1]

Silver nitrate is a silver salt prepared by reacting silver oxide with an acid. Write the formula of the acid that reacts with silver oxide to produce silver nitrate.

(c(i))[1]

Describe what is observed when aqueous silver nitrate is added to aqueous sodium iodide, $\text{NaI}(aq)$.

(c(ii))[3]

Write the ionic equation for the reaction of aqueous silver nitrate with aqueous sodium iodide. Include state symbols.

(d)[2]

Name this other substance and the gas produced.

(e)[1]

When silver nitrate is exposed to sunlight, silver is formed. Name the type of reaction that requires light in order to occur.

(f(i))[1]

Name one member of this homologous series.

(f(ii))[2]

Name two products formed when the compound in (i) reacts with chlorine.

Worked solution & mark scheme

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