Types of Crystals

Define each type of crystal:- Ionic Crystals: These crystals are formed by ionic bonds between cations and anions. They typically have high melting and boiling points and are hard and brittle. Example: Sodium chloride (NaCl)

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Define each type of crystal:- Covalent Crystals: These consist of atoms connected by covalent bonds in a continuous network. They are usually very hard and have high melting points. Example: Diamond (a form of carbon).

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Define each type of crystal:- Metallic Crystals: These consist of metal atoms held together by metallic bonds, which allow for conductivity and malleability. They have a characteristic luster and can conduct electricity. Example: Copper (Cu)

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Define each type of crystal:- Molecular Crystals: These are formed by molecules held together by intermolecular forces (like van der Waals forces). They generally have lower melting points and are softer than other types. Example: Ice (solid H20)

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Rocks that have minerals that are too small to see are called ______ grained.

• fine

• coarse

Which is the only type of rock that can contain fossils?

• igneous

• metamorphic

• sedimentary