Chemistry Vocabulary Concept Map
by Jasmir Williams

1. Atom- basic unit of matter
2. Atomic Number- the number of protons in the nucleus of an atom
2.1. Mass Number- the number of protons and neutrons in the nucleus
3. Electron Dot Diagram- a diagram that shows the number of valence electrons an element has by surrounding the symbol with dots
4. Element- a pure substance that cannot be broken down into simpler substances
5. Ion- atom or molecule that has an electrical charge because it has gained or lost electrons
6. Isotope- one of several forms of the same element
7. Nucleus- positively charged, dense center of an atom
7.1. Atomic Radius- the distance from the nucleus to the outermost electrons
7.1.1. Energy Level- where energy levels orbit the nucleus
7.2. Proton- a positively charged particle located in the nucleus
7.3. Neutron- a particle with no charge that resides in the nucleus
7.4. Electron- negatively charged particle that moves around the nucleus
7.4.1. Positron- the positively charged antimatter counterpart of an electron
8. Periodic Table- a chart that organizes elements based on their properties
8.1. Chemical family- a vertical column in the periodic table of elements
8.2. Period- a horizontal row of the periodic table
9. Radioactive- capable of releasing radiation
9.1. Daughter product- an atom that results from the decay of a radioactive atom
9.2. Alpha particle- positively charged particle that is emitted from the nucleus of a radioactive atom
9.2.1. Beta particle- negatively charged particle that is emitted from the nucleus of a radioactive atom