Valence
electron
electron subscript
Mendeleev
atom
metalloid
proton
Noble
Gas
nucleus
octet
Trench
earthquake subduction
Theory of
Plate
Tectonics
Rift
valley
Volcano
Transform Continent Wegener
boundary al Drift
Law of
Conservation
of mass
Valence
electron
electron
Mendeleev
• atom
positive
metalloid
proton
Noble
Gas
nucleus
octet
metalloids
• stair step
• properties
Reactivity
• Bond or bonding
Group
• Vertical
• Elements
• Periodic table
Noble Gas
• Group
• 18
Rift Valley
• Divergent
• continental
Subscript
• Little
• Number
• below
Earthquake
• Transform
Subduction
• Convergent
• volcano