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Biology (Sci)
BIOL 112
Frieder Schoeck

Small Molecules Chemical Bonds All living things are made up of generally 6 compounds in yellow Postassium K and Sodium Na are key as ions in the bodyThe rest are key as protein cofactors Occur in tiny amounts in cells ElementsNucleus has protons and neutrons Electrons around itEqual numbers of protons and electronsAtomic weight is number of protons and neutrons added together Often referred to as Daltons D The mass is a relative atomic mass averaged out between the isotopesAtomic number is number of protons which defined identity of an elementIsotopes have equal number of protons but different number of neutrons The same chemical properties but are often unstable Radioactive Eg Can be used as tracers in medicine 14C is used in carbondating Connecting atoms together to create molecules electrons take priorities
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