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15 Cards in this Set

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Biochemisty
The study of chemistry in living organsisms
Matter
Anything that has weight and takes up space
Examples of Elements
Iron, copper, silver, gold, aluminum, carbon, hydrogen, and oxygen
Compounds
chemical combinations
Bulk Elements
Elements needed by the body in large amounts
Examples: carbon, hydrogen, oxygen, nitrogen, sulfer, and phosphorus
Trace Elements
Elements needed by the body in small amounts
Used by the body for parts of enzymes
Elements
Composed of particles called atoms
Electrons
Carry a negative charge
Protons
Carry a positive charge
Neutrons
Electrically neutral
Nucleus
Positively charged
A Complete Atom
Electrically neutral
Atomic Number
The number of protons in the atoms of a particular element
Atomic Weight
The number of protons plus the number of neutrons in each of an elements atoms
Isotopes
Atoms that have the same atomic numbers but different atomic weights