Why can carbon form very large molecules? It can bond with other carbon atoms that are bonded to other molecules. Its +4 valence forms ionic bonds. It has a natural ionic charge of +4.

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water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.