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Biology Unit 1

TermDefinition
Atom The smallest part of an element, has the elements chemical properties
Element One of a class of substances, made of atoms with the same number of protons
Molecule Smallest physical part of an element
Compound A pure substance made of two or more elements
Atomic number The number of protons in the element
Mass number The atomic weight of atom = to the number of neutron and protons
Atomic weight The average weight of an atom of an element
valence electron An electron of an atom in the outermost shell
Electron Has a negative charge
Proton Has a positive charge
Neutron Has a nuetral charge
Isotope Any two or more elements that have the same number of protons, or the same atomic number w/ different numbers of neutrons in the nucleus, or different atomic weights.
Radioisotope A radioactive isotope, usually artificial
Electron configuration The distribution of electrons of an atom or molecule
Bond A chemical lin between two atoms where electron pairs are shared.
Polar bond A bond between two atoms where electrons are shared unequally.
Nonpolar bond A bond where two atoms share electrons.
Hydrogen bond The electromagnetic attraction created between a partially positively charged hydrogen atom attached to a highly electronegative atom and another nearby electronegative atom
Solvent the liquid in which a solute is dissolved to form a solution.
Solution Solution is uniform mixture
Solute Solute is what gets dissolved
Hydrophobic Substance does not have an affinity for water of fear of water
Hydrophilic Substance has an affinity or love of water
Amino acid The structural units (monomers) that make up proteins.
Nucleotide The monomer of a nucleic acids.
Peptide bond A chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O).
Lipid Fats
Saturated fat A type of fat that is most often solid at room temperature.
Saccharide Another term for sugar
Specific heat (water) The temperature of water does not change easily
Created by: Ealexander5357
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