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Grade 8 atomicstruct

atomic structure and the periodic table/balancing equations

An atomic particle that is positively charged. proton
An atomic particle that has no charge. (think neutral) neutron
An atomic particle that is negatively charged and moves outside the nucleus. electron
The part of the atom that contains protons and neutrons. nucleus
The number of protons in an atom's nucleus, which serves to identify an atom. atomic number
The sum of an atom's protons and neutrons. atomic mass number
An element that has the same number of protons but different number of neutrons in the nucleus. Isotope
Formed when an atom loses or gains one or more electrons. ion
It's the average mass of the isotopes of atoms of an element. atomic mass
A table showing a repeating pattern of properties of the elements. Periodic Table
Each horizontal row in the periodic table. Period
Term used indicates how likely the element is to undergo a chemical change. Reactive
Elements that conduct electricity and heat well, and have a shiny appearance. metals
the elements on the right side of the periodic table that have properties opposite of those metals. Nonmetals
elements that have properties of both metals and nonmetals. Metalloids
The process by which atoms produce energy and produce particles. radioactivity
The amount of time it takes for one-half of the atoms in a particular sample to decay. half-life
The Actinoid series of elements are gases or solids? solids
Created by: ahsimmon