Periodic table flashcards
an arrangement of elements in columns, based on a set of properties that repeat from row to row.
Periodic table
A chemist who developed the periodic table and organized elements by their properties while leaving empty spaces for more elements to be discovered
Mendeleev
A pure substance that cannot be broken down.
Element
A row going across on the periodic table
Period
A column going up and down on the Periodic Table
Group / Family
The pattern of repeating properties down each group in the periodic table
Periodic law
A one or two letter symbol that represents that name of an element
(first letter is capital and potential second letter is lowercase)
Chemical / Element Symbol
number of protons in an element,
atomic # is also equal to the number of electrons
Atomic Number
The number of protons and neutrons in the nucleus (center) of an element
Atomic Mass
A material that allows things to flow
Conductor
elements that are good conductors of heat and electric current
Metal
elements that are poor conductors of heat and electric current
Nonmetal
elements with properties that fall between those of metals and nonmetals
Metalloid
Elements in group 18, stable and nonreactive
Noble Gas
A particle with a positive charge, same amount as atomic number, this particle identifies the element
Proton