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Chem Chapter 3 Vocab

Vocab for chemistry chapter three.

TermDefinition
Nucleus The central core of an atom containiing protons and usually neutrons.
Proton A small, positively charged particle in the nucleus of an atom.
Electron A tiny, negatively charged particle that moves around the nucleus of an atom.
Nuetron A small particle in the nucleus of an atom, with no elctrical charge.
Atom The basic particle from which all elements are made.
Atomic Number The number of protons in the nucleus of an atom.
Mass Number The sum of protons and neutrons in the nucleus of an atom.
Isotope An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
Atomic Mass The average mass of all the isotopes of an element.
Periodic Table a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure
Chemical Symbol A one- or two-letter representation of an element.
Periods A horizontal row of elements in the periodic table.
Groups Elements in the same vertical column of the periodic table, also called the family.
Metal A class of elements characterized by physical properties that include shininess, maleabilidad, ductility, and conductivity.
Nonmetal An element that lacks most of the properties of a metal.
Mettaloid An element that has some characteristics of both metals and nonmetals.
Matter Anything that has mass and occupies space.
Solid A state of matter that has a definite shape and definite volume.
Liquid A state of matter that has no definite shape but has a definite volume.
Gas A state of matter with no definite shape or volume.
Created by: ShiS
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