Periodic Table Flashcards
What is the Law of Mendeleev?
Properties of the elements recur in regular cycles (periodically) when elements are arranged in order of increasing atomic mass
What is special about the Mendeleev’s work?
2
He left gaps for undiscovered elements in his table
He predicted the properties of the missing elements
What are the periods of the periodic table?
The horizontal rows of the table
What are the groups of the periodic table?
The vertical columns of the table
What are groups also called?
Families
What is group 18 called?
The noble gases
What group are the noble gases?
Group 18
What are the five most common groups?
Alkali metals
Alkaline earth metals
Chalcogens
Halogens
Noble gases
What group are the alkali metals?
Group 1
What group are the alkaline earth metals?
Group 2
What groups are the chalcogens?
16
What group are the halogens?
17
What group are the noble gases?
18
