Chapter 5 Flashcards
(8 cards)
1
Q
periodic
A
describes something that occurs or repeats at regular intervals
2
Q
periodic law
A
the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
3
Q
period
A
in chemistry, a horizontal row of elements in the periodic table
4
Q
group
A
a vertical column of elements in the periodic table; elements in a group share chemical properties
5
Q
alkali metal
A
one of the elements of group 1 of the periodic table
6
Q
alkaline-earth metal
A
one of the elements of group 2 of the periodic table
7
Q
halogen
A
one of the elements of group 17 of the periodic table; halogens combine with most metals to form salts
8
Q
noble gases
A
one of the elements of group 18 of the periodic table; noble gases are unreactive
