A crystal consists of a regular repeating pattern of particles - Leaving Cert Chemistry - Question B - 2020
Question B
A crystal consists of a regular repeating pattern of particles. These particles can be atoms, ions or molecules.
(i) The photograph on the right shows sodium chlori... show full transcript
Worked Solution & Example Answer:A crystal consists of a regular repeating pattern of particles - Leaving Cert Chemistry - Question B - 2020
Step 1
What particles, atoms, ions or molecules, make up a sodium chloride crystal?
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Answer
Sodium chloride (NaCl) crystals are composed of ions, specifically sodium ions (Na⁺) and chloride ions (Cl⁻).
Step 2
What particles, atoms, ions or molecules, are covalently bonded in diamond and graphite?
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Answer
In diamond and graphite, the particles that are covalently bonded are atoms.
Step 3
What particles, atoms, ions or molecules, become free to move around when ice crystals melt?
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Answer
When ice crystals melt, the molecules become free to move.
Step 4
Why can metallic crystals conduct electricity?
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Answer
Metallic crystals can conduct electricity due to the presence of electrons that are free to move, also referred to as delocalized electrons or electrons shared by all atoms (positive ions).
Step 5
What type of electromagnetic radiation did William and Lawrence Bragg first use to determine crystal structures?
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William and Lawrence Bragg first used x-rays to determine crystal structures.
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