Groups of the Table
The Lanthanides are also known as what?
What are rare Earth metals?
The rows that ruy from left to right on the periodic table are known as what and how many are there?
What are periods and there are 7
The atomic number of an element shows ___.
What is the number of protons (which equals the number of electrons)
How many naturally occurring elements are on the periodic table?
What is 94?
What is the largest group of elements in families 3-12 called?
What are transition metals?
Which metal is liquid at room temperature?
What is mercury?
The Actinides are also known as what?
What is radioactive?
The vertical columns on the periodic table are known as what and how many are there?
What are families? There are 18
What are the elements in family 17 called and how many electrons are in the outer energy level?
What are halogen gases and 7 electrons?
Elements located within the same family on the periodic table have similar what?
What is properties?
The Modern Periodic Table is based on what?
What is increasing number of protons? (atomic number)
Ther largest class of elements on the periodic table are the?
What are metals?
What are the elements in family18 called and why are they considered relatively unreactive?
What are noble gases and full outer energy levels?
Elements #57-#70 are known as ___ and elements #89-#102 are known as ____.
What are lanthanides? What are actinides?
The Actinides are mostly man made except for which three?
What is Actinium, Thorium, and Uranium/
The electrons called in the outermost energy level of an atom.
What are valance electrons?
elements with a full outer energy level tend to be?
What is non-reactive?