Periods are this that run from left to right.
What are rows?
I am a nonmetal in the Halogen family with an atomic mass of 35.
Who is Chlorine?
Period 4, Group 6
Chromium
This family has 1 electron in it's outer shell.
What is Alkali Metals?
Iodine
Period 5, Group 17
Groups are these that run from top to bottom.
What are colums.
I am a transition element with 25 electrons.
Who is Manganese?
Period 3, Group 17
Chlorine
This family includes all elements in group 2.
What are the Alkaline Earth Metals?
Silicon
Period 3, Group 14
Elements in the same period have the same number of these.
Energy levels
I am in period 2 with an atomic mass of 11.
Who is Boron?
Period 6, Group 18
Radon
This family includes elements that have both metallic and nonmetallic properties.
What are metalloids?
Barium
Period 6, Group 2
Elements in the same group have the same number of these.
Valence electrons
I have the lowest atomic mass in group 4.
Who is Titanium?
Period 1, Group 1
Hydrogen
This stable family of elements is considered inert or nonreactive.
What are Noble Gases
Germanium
Period 4, Group 14
Elements in families have similar this.
What are properties?
I am a metal with 4 neutrons.
Who is lithium?
Period 2, Group 15
Nitrogen
This family of nonmetals has 7 valance electrons.
What are the halogens?
Bismuth
Period 6, Group 15