Question

sep construct an explanation why is a crystal of strontium chloride (srcl₂) described as an extended structure?

Explanation:

Strontium chloride (\(SrCl_2\)) is an ionic compound. Ionic compounds form crystals. In the crystal of \(SrCl_2\), there is no discrete \(SrCl_2\) molecule. Instead, the \(Sr^{2 +}\) and \(Cl^-\) ions are arranged in a repeating three - dimensional pattern. This repeating pattern extends throughout the crystal. There are no fixed boundaries for a single unit like in a molecular compound. The entire crystal is one continuous arrangement of ions following the ratio of \(Sr:Cl = 1:2\) (from the formula \(SrCl_2\)). So, it is described as an extended structure.

Answer:

A crystal of \(SrCl_2\) is an extended structure because it consists of \(Sr^{2+}\) and \(Cl^-\) ions arranged in a repeating three - dimensional pattern (no discrete molecules; continuous ion arrangement following the \(1:2\) ratio of \(Sr\) to \(Cl\) from the formula), extending throughout the crystal.