Periodic Table Basics
This scientist created the first widely accepted periodic table.
Dmitri Mendeleev
The most reactive metals belong to this group.
Alkali Metals
These elements are shiny, conductive, and found on the left and center of the periodic table.
Metals
These rare elements found in nature include cerium and neodymium.
Lanthanides
What is the BROAD name for things such as carbon, neon, hydrogen, germanium, oxygen, etc.?
elements
These vertical columns on the periodic table help identify element families.
Groups
Elements in this group are nonreactive because they have full outer electron shells.
Noble Gases
These elements are dull, brittle, and poor conductors.
Nonmetals
This series contains elements that are radioactive and mostly synthetic.
Actinides
The nucleus contains these two types of particles.
Protons and Neutrons
These horizontal rows run left to right on the periodic table.
Periods
Fluorine and chlorine are part of this highly reactive nonmetal family.
Halogens
These elements sit along the zigzag line and have properties of both metals and nonmetals.
Metalloids
These two actinides occur naturally.
Uranium and Thorium
These two families are the MOST reactive on the periodic table.
Alkali metals and halogens
This term means “a pattern that repeats regularly.”
Periodic
These metals in Groups 3–12 are known for being good conductors and often used in jewelry and wiring.
Transition Metals
Aluminum, gold, and copper belong to this type of element.
Metals
Why are there two floating periods underneath the periodic table? (two reasons)
To make the table fit on paper, and because they have different properties
The atomic number is determined by the amount of this subatomic particle.
These three pieces of information appear in element cells: atomic number, chemical symbol, and WHAT?
atomic mass
This family, in Group 14, includes carbon, silicon, and tin.
Carbon Family
These elements are semiconductors.
Metalloids
It means that an element radiates energy because it is so unstable.
For an atom to be stable, how many electrons does it need?
Same number as the amount of protons