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8th atoms vocab
8th grade atom vocab
Definition | Term |
---|---|
The mass of an atom expressed in amu (automic mass units) | Atomic Mass |
The sum of the number of protons and neutrons in the nucleus of an atom | Mass Number |
An atom that has the same number of protons as other atoms of the same element, but has a different number of neutrons | Isotope |
A subatomic particle with a negative charge | Electron |
An atom's central region, which is composed of neutrons and protons | Nucleus |
Region around the nucleus of an atom where electrons are likely to be found | Electron Cloud |
The smallest unit of an element that maintains the properties of the element | Atom |
The number of protons in the nucleus of an atom | Atomic Number |
A subatomic particle that has no charge and is found in the nucleus of an atom | Neutron |
A unit of mass that describes the mass of an atom or molecule | AMU (atomic mass unit) |
A subatomic particle that has a positive charge and is located in the nucleus of an atom | Proton |
An atom with an electric charge due to loss or gain of one or more elctrons | Ion |