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CBB chapter 3

The central core of an atom containing protons and usually neutrons Nucleus
A small positively charged particle in the nucleus of an atom Proton
A small particle in the nucleus of an atom, with no electrical charge Neutron
A tiny negatively charged particle that moves around the nucleus of an atom Electron
The number of protons in the nucleus of an atom Atomic number
An atom with the same number of protons and a different number of neutrons from other atoms of the same element Isotope
The sum of protons and neutrons in a the nucleus of an atom Mass number
In science, a diagram, a mental picture, a mathematical statement, or an object that helps explain ideas about the natural world Model
The average mass of all the isotopes of an element Atomic mass
A chart of the elements showing the repeating pattern of their properties Periodic table
A one- or two- letter representation of an element Chemical symbol
A horizontal row of elements in a periodic table Period
Elements in the same vertical column of the periodic table, also called a family Group
A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity Metals
A term used to describe material that can be pounded into shapes Malleable
A term used to describe a material that can be pulled out into a long wire Ductile
The ability of an object to transfer heat or electricity to another object Conductivity
The ease and speed with which an element combines, or reacts, with other elements and compounds Reactivity
The gradual wearing away of a metal element due to a chemical reaction Corrosion
An element in group 1 of the periodic table Alkali metal
An element in group 2 of the periodic table Alkaline Earth Metal
One of the elements in groups 3 through 12 of the periodic table Transition metals
A mixture of two or more elements, one of which is a metal Alloy
An element that lacks most of the properties of a metal Nonmetal
A molecule consisting of two atoms Diatomic molecule
An element found in group 17 of the periodic table Halogen
An element in group 18 of the periodic table Noble gas
An element that has some characteristics of both metals and nonmetals Metalloid
A substance that can conduct electricity under some conditions Semiconductor
Created by: Pettolina2013