Learn about the organization of the periodic table into groups and periods and how these differ. Also learn the history of the periodic table and its properties.

Learn about valence electrons and how to find the number of valence electrons on the periodic table. Discover the role of a valence electron in an atom.

What are Atomic and Ionic radius trends? Learn about ionic and atomic radius, examine trends of atomic and ionic radius on the periodic table, and see the differences between them.

When describing atoms and elements, there are three other numbers that may be present in a periodic table: atomic number, mass number, and average atomic mass.

What are nonmetal elements? Learn the nonmetal definition, about the nonmetals on the periodic table, and see a list of nonmetals and nonmetal examples.

However, the noble gases also have other properties in common. Remember, the noble gases are in Group 18 of the periodic table and groups in the periodic table can also be referred to as …

How did Moseley organize the periodic table? Moseley organized the periodic table according to the protons in the nuclei of atoms, called their atomic numbers.

Atomic mass is shown on the periodic table. It is the number with a decimal on the periodic table and is often listed below the symbol for the atom. Mass number is not shown on the periodic …

Steps for Identifying S, P, D, & F -Block Elements Step 1: Find the element on the periodic table. Step 2: Use periodic table landmarks and mnemonic devices to determine the block.

What is meant by an effective nuclear charge? Describe the definition, formula, calculation, periodic table trend, and chart of effective nuclear charge.