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Chapter 14- Integrated Science

Terms in this set (15)

Atomic mass
The mass of an element's atoms listed in the periodic table as an average value based on the relative abundance of the element's isotopes.
Atomic nucleus
The dense, positively charged center of every atom.
Atomic number
A count of the number of protons in the atomic nucleus.
Atomic symbol
An abbreviation for an element or atom.
Electron
An extremely small, negatively charged subatomic particle found outside the atomic nucleus.
Element
Any material that is made up of only one type of atom.
Group
A vertical column in the periodic table, also known as a family of elements.
Isotope
Any member of a set of atoms of the same element whose nuclei contain the same number of protons but different numbers of neutrons.
Mass number
The total number of protons and neutrons within an isotope.
Neutron
An electrically neutral subatomic particle of the atomic nucleus.
Nucleon
Any subatomic particle found in the atomic nucleus. Another name for either a proton or a neutron.
Period
A horizontal row in the periodic table.
Periodic Table
A chart in which all known elements are listed in order of atomic number.
Proton
A positively chared subatomic particle of the atomic nucleus.
Shell
A region of space around the atomic nucleus in which electrons may reside.
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