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Anything that has mass and takes up space. Matter
Smallest particles of an element that still has all the properties of that element. Atoms
Central part of an atom that is made of protons and neutrons. Nucleus
Smaller that an atom. Subatomic
Particle with a positive charge that is part of a nucleus of an atom. Proton
Negatively charged particle that is the smallest of the three main particles that make up an atom. Electron
Number of protons in the nucleus of an atom. Atomic Number
Sum of the protons and neutrons in an atom. Mass Number
Atoms of the same element that have different numbers of neutrons. Isotope
Electron in an atom’s outermost shell or energy level. Valence Electrons
Substance that cannot be broken down chemically into simpler substances and is made up of only one type of atom. Element
Table in which elements are arranged in order of increasing atomic number. Periodic Table
Inert or un-reactive element in group 18 of the periodic table. Noble Gas
Element that is usually shiny, is a good conductor of heat and electricity, and can be hammered into different shapes or drawn into a wire. Metal
Element that is not shiny, usually does not conduct heat or electricity well, and cannot be pounded into different shapes or drawn into a wire. Nonmetal
Elements that have some properties of both metals and nonmetals. Metalloid
Created by: tohunter