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Chemistry Chapter 3!

chapter 3 vocab

atom smallest object that retains properties of an element
Plum-Pudding Model each atom was a sphere filled with a positively charged fluid and electrons
Gold-Foil Experiment experiment to probe the structure of the atom
Orbitals an energy state in the atomic model which describes where an electron will likely be
nucleus central part of an atom that contains the protons and neutrons
proton particle found in a nucleus with a positive charge
electron one of parts of the atom having a negative charge
neutron particle found in the nucleus of an atom
mass number the sum of protons and neutrons
atomic number the number of protons in an atom
ion removing or adding electrons to an atom creates an ion (a charged object very similiar to an atom)
isotope element with the same number of protons but have different numbers of neutrons
atomic mass the mass of a specific isotope of a given atom
valence electrons the electrons in the outermost shell of an atom
octet group of eight valence electrons surrounding an atom
excited state state in which an atom or molecule picks up outside energy
ionization energy energy required to remove an electron from a specific atom
electron affinity the energy change that occurs when an electron is added to a gaseous atom
electronegativity measure of a substances' ability to attract electrons
Created by: janthony1