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Chapter 16 sect. 1-2
atomic structure
Term | Definition |
---|---|
isotope | atoms of the same element that have different numbers of neutrons |
average atomic mass | weighted average mass of all naturally occuring isotopes of an element |
atomic number | identifies the type of atom |
mass number | sum of the number of protons and number of neutrons in the nucleus |
protons | particles in the nucleus with an electrical charge of +1 |
Neutrons | electrically neutral particles in the nucleus |
electrons | particles with an electric charge of 1- |
electron cloud | area around the nucleus of an atom where electrons are most likely to be found |