the periodic table Flashcards
the vertical columns on the periodic table are called ______
groups
the horizontal rows on the periodic table are called ____
periods
most of the elements on the periodic table are classified as ________
metals
the elements that touch the zigzag line are classified as ________
metalloids
the elements in the far upper right corner are classified as ________
nonmetals
which is the first group?
alkali metals
how many valence electrons do alkali metals have?
one
which is the second group?
alkaline earth metals
how many valence electrons do alkaline earth metals have?
two
which is the third through twelfth group?
transition metals
which is the seventeenth group?
halogens
how many valence electrons do halogens have?
7
which is the eighteenth group?
noble gases
how many valence electrons do noble gases have?
8
how many valence electrons does the thirteenth group have?
3
how many valence electrons does the fourteenth group have?
4
how many valence electrons does the fifteenth group have?
5
how many valence electrons does the sixteenth group have?
6
what is the first period at the bottom called?
lanthanides
what is the second period at the bottom called?
actinides
