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Along with hydrogen, nitrogen, oxygen, phosphorus, and sulfur, carbon is a building block of biochemical molecules ranging from fats, proteins, and carbohydrates to active substances such as hormones.

As soon as they come to rest, they combine with an electron to form two -ray photons in a matter-antimatter annihilation reaction.-decay are often obtained in an excited state.

Alpha decay is usually restricted to the heavier elements in the periodic table.

(Only a handful of nuclides with atomic numbers less than 83 emit an -particle.) The product of -decay is easy to predict if we assume that both mass and charge are conserved in nuclear reactions.

Geber, Jabir ibn Hayyan, born in Persia (Iran) in the 6th Century AD.

Geber systemized and brought experimental methods to alchemy.

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