5 The Periodic Table Flashcards
Periodic
describes something that occurs or repeats at regular intervals
Periodic law
The law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements.
Period
In chemistry , a horizontal row of elements in the periodic table
Group
A vertical column of elements in the periodic table ; elements in a group share chemical properties.
Alkaline metals
one of the elements of Group 1 of the periodic table ( lithium,sodium,potassium,rubidium,cesium, and francium)
Alkaline-earth metals
one of the elements of Group 2 of the periodic table (beryllium, magnesium,calcium,strontium,barium,and radium)
Halogens
one of the element of Group 17 of the periodic table (fluorine, chlorine,bromine,iodine,and astatine); halogens combine with most metals to form salts
Noble gases
one of the elements of Group 18 of the periodic table (helium,neon,argon,krypton,xenon,and radon); noble gases are unreative