Why some substances melt instantly while others remain rock solid
In short: Discover how the sharing of electrons creates the structural diversity of our world. This video explains the chemistry of covalent bonds, from the water in your glass to the diamonds in a ring.
Covalent bonding occurs when non-metal atoms react by sharing electrons rather than transferring them. Because these atoms have electron shells that are already mostly full, they find it energetically unfavorable to lose electrons. Instead, they overlap orbitals to create bonding orbitals that hold two or more electrons.
The strength and properties of a substance depend on its structure. Small molecules like water have weak intermolecular forces, leading to low melting points and volatility. In contrast, elements like carbon and silicon form giant covalent lattices. In diamonds, carbon atoms form four bonds in a rigid structure, requiring the breaking of actual covalent bonds—rather than just weak forces—to change state, resulting in extremely high melting points.
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Sources
- Summary by Intellect · source: What Are Covalent Bonds | Properties of Matter | Chemistry | FuseSchool
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