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Basic Biochem

TermDefinition
atom the basic unit of matter
atomos the Greek word which means "unable to be cut"
Democritus this Greek philosopher first referred to the atom 2500 years ago
protons, neutrons, and electrons the subatomic particles that make up atoms
nucleus protons and neutrons bound together at the center of the atom
electron a negatively charged particle
proton a positively charged particle
neutron a neutral subatomic particle
element a pure substance that consists entirely of one type of atom
isotopes atoms of the same element that differ in the number of neutrons they contain
radioactive means that nuclei are unstable and break down at a constant rate over time
compound a substance formed by the chemical combination of two or more elements by definite proportions
ionic bonds and covalent bonds the two types of chemical bonds
ionic bond a chemical bond formed when one or more electrons are transferred from one atom to another
covalent bond a chemical bond formed when electrons are shared between atoms
molecule the smallest unit of most compounds
van der Waals forces a slight attraction that develops between the oppositely charged regions of nearby molecules
Created by: Askjagden
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