12/17/14 Flashcards
1
Q
Periodic
A
describes something that occurs or repeats at regular interval
2
Q
Periodic Law
A
state that the repeating chemical and physical properties of elements change periodically with the elements atomic number
3
Q
Period
A
in chemistry, a horizontal row of elements in the periodic table
4
Q
Group
A
Each vertical column of elements (from top to bottom) on the periodic table
5
Q
Alkali metal
A
Elements in group 1 of the periodic table
6
Q
Alkaline-earth metal
A
Are less reactive than than alkali metals are.
7
Q
Halogen
A
Are very reactive non metals because their atoms need to gain only one electron to have a complete outer level
8
Q
Noble Gas
A
Are un-reactive non metals and are in group 18 of the periodic table
