Reviewing Properties of Periodic Table

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For the most part how do the atomic masses progress throughout the periodic table?

More than two thirds of the elements are classified as

Why is S (Sulfur) before Cl (Chlorine) on the periodic table?

Phosphorus would have chemical properties most like which of the following?

Which quantity identifies an element

Which class of elements best conducts electricity

According to the periodic table the neutral (stable) atom of what element has 5 protons, 5 electrons and 5 neutrons

What can be determined if only the atomic number of an atom is known?