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Atoms Study Terms

An atom with a positive or negative charge ion
Atoms with the same number of protons, but different numbers of neutrons. isotope
The number that is used to identify an atom atomic number
Negatively charged particles that form a cloud around the nucleus of an atom electron
A column on the periodic table composed of atoms with similar properties group
Different regions around the nucleus of an atom where an electron is likely to be found energy levels
A number that represents the charge an atom will have with a full valence. oxidation number
An atom that has lost electrons so it has a positive charge. cation
The process of splitting the nucleus of an atom fission
The highest energy level in which electrons are found on a given atom valence
A number that represents the average amount of protons and neutrons combined for a given element. atomic mass
The smallest unit of a compound; formed when atoms bond molecule
This feature of the periodic table correlates with the number of energy levels in an atom. periods
Hard, usually solid elements found on the left side of the periodic table that tend to lose electrons metals
Elements that have characteristics of both metals and nonmetals metalloids
An atom with a negative charge due to gaining extra electrons anion
A type of radiation that is highly ionizing, but has very little penetration. alpha
The process of one element changing into another by releasing particles from its nucleus. radioactive decay
Rule stating that atoms are most stable when they have 8 electrons in their valence octet
Type of radiation with low ionization but high penetration gamma
An unstable form of an element due to its neutrons which will change into another element over time radioisotope
Source of energy due to combining the nucleus of two small atoms to form a larger one. fusion
Form of radiation produced when a proton changes into a neutron and releases an electron beta
A model of an atom which focuses on showing electrons on all of an atom’s energy levels Bohr model
Usually one or two letters that represent and certain element chemical symbol
A form of notation that represents a molecule chemical formula
A molecule which is neutral, but has a positive side and a negative side. polar
A force which works at close distances to bind the nucleus of an atom together strong nuclear force
The process of measuring the ratio of unstable isotopes to the stable form to determine the time since it formed. radiometric dating
A family of elements which are not reactive noble gases
The amount of time it takes for half of the mass of a radioactive isotope to decay into a more stable form. half-life
Created by: jaredlovering