Organization
The Periodic Table organizes all 118 elements into one of these, with rows and columns.
What is a grid?
He was the first to successfully organize all of the known elements.
Who is Mendeleev?
This group lacks qualities of metals.
What are non-metals?
These tend to be hard, solid, conductive materials.
What are metals?
This has the symbol H.
What is Hydrogen?
The Periodic table puts the elements in order of this.
What is the atomic number?
It was in this century that the first Period Table of Elements was made.
What are the 1800s?
Elements in this group, known as the "Salt-formers", each have 7 valence electrons.
What are the Halogens?
These soft, lustrous metals are so reactive that you must be careful exposing them to water.
What are Alkali Metals?
This is the symbol for Calcium.
What is Ca?
These elements share similar properties and typically are in the same column.
What is a group?
Mendeleev's table had a repeating, or one of these, pattern to it.
What is periodic?
This group makes up Group 2.
What are Alkaline Earth Metals?
These elements are not found in nature, but can be made in a lab.
What are synthetic elements?
This has the symbol Cl.
What is Chlorine.
About 75% of the elements (including all but the right-most side of the table) are counted as these.
What are metals?
Mendeleev left these in his table, predicting some elements that had not yet been discovered.
What are blanks?
Elements in this group have a full valence electron energy level, and do not react with other elements.
What are the Noble Gasses?
This element is special because, while the other members of the group have 8 valence electrons, it only has 2.
What is Helium?
This is the symbol for Potassium.
What is K?
Elements that have their valence electrons in the same energy level are found in the same one of these.
What is a period?
He took the original Periodic Table, and fixed it by organizing the elements by atomic number instead.
Who is Henry Mosely?
This heavy group is made up of mostly synthetic elements.
What are the Actinides?
This element has properties that make it fit in Group 1 and Group 17.
What is Hydrogen?
This is the symbol for Lead
What is Pb?