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Atoms

Atoms and Periodic Table

QuestionAnswer
Atom The building block of matter.
Matter Anything that takes up space and has mass.
Proton The positive part of an atom.
Electron The negative part of an atom.
Neutron The neutral part of the atom. No charge.
Nucleus In the center of an atom. Contains the protons and neutrons.
Electron shells Orbits around the nucleus. Contains the electrons.
Element Made up of like atoms.
Periodic Table of Elements List of all elements that build matter.
Atomic number Number of protons and electrons in an atom. The number of the element on the Periodic Table of Elements
Element symbol Abbreviation of an element.
Element name Name of the element on the Periodic Table of Elements
Atomic Mass The number of protons and neutrons in an atom.
Bohr Model Model of an atom that shows all the particles in an atom.
Valance electron The electrons in the outermost shell of an atom.
Electrons in 1st and 2nd Shells 2 in the first; 8 in the second
Size of electron Smallest particle in an atom.
Size of neutron and protons. About the same size. Bigger than electrons.
Finding number of neutrons. Neutrons = atomic mass - atomic number.
Created by: cook2sm