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2-1

chemistry of life

TermDefinition
matter Anything that occupies space and has mass
mass Quantity of matter an object has
element Substances that cannot be broken down chemically into simpler kinds of matter
atom Simplest particle of an element that retains all of the properties of that element
nucleus Central region of atom
proton subatomic particle that has a positive charge
neutron subatomic particle that has no charge
atomic number Number of protons in atom
mass number Total number of protons and neutrons in an atom
electron Negatively charged particles
orbital 3D region around a nucleus that indicates the probable location of an electron
isotope atoms of the same element that have a different number of neutrons
compound made up of atoms of two or more elements in fixed proportions
chemical bond attractive forces that hold atoms together
covalent bond forms when two atoms share one or more pairs of electrons
molecule the simplest part of a substance that retains all of the properties of that substance and can exist in a free state
ion atom or molecule with an electrical charge
ionic bond attraction of ions with positive and negative electical charges
Created by: farlowm16
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