tiny, negatively charged particle that moves on the outside of an atom in a cloud

small, positively charged particle in an atoms nucleus

small particle in the nucleus with no electrical charge

where protons and neutrons are located

the number of protons in the nucleus of an atom

sum of protons and neutrons in the element

the average mass of all the isotopes of an element

an atom or group of atoms that becomes electrically charged

a pure substance that cannot change or broken down

the basic particle of an element, smallest particle of one element that shares the same properties

neutral group of 2 or more atoms held together by covelent bonds

arrangement of the elements dependent on their properties

elements in the same vertical column of the periodic table, called a family

horizontal group of elements on the table

class of elements characterized by physical properties such as conductivity, malleability, ect.

lacks the properties of a metal

has the properties of a metal and nonmetal

electrons in the highest energy level of an atom and aid in chemical bonding

atom with the same amount of protons but different amount of neutrons than other atoms of the same element

describes a substances ability to change into another substance

alters form or appearance but does not change the substance

measurement of how much mass of a substance contained in a given volume

matter that has a definite composition such as an element or compound

two or more substances that are together but are not chemically bonded