Periodic Table Answers

In an element’s square on the periodic table, the number with the greatest numerical value represents the

How many groups are in the modern periodic table?

Dmitri Mendeleev and Henry Moseley developed their periodic tables about forty years apart. During that time, many discoveries in chemistry were made.

The element phosphorus is located to the right of the element magnesium along the same period in the periodic table.Which best describes the relationship of the elements?

This is how zirconium appears in the periodic table.

This is how fluorine appears in the periodic table.

Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?

Elements in group 2 are all called alkaline earth metals. What is most similar about the alkaline earth metals?

While developing his periodic table, Dmitri Mendeleev broke his own rule and placed the element tellurium before iodine in the group. He did this even though tellurium's atomic mass was known to be greater than iodine's. In his notes, Mendeleev stated that he expected tellurium to have a lower atomic mass than iodine. However, all measurements continue to show that tellurium has a greater atomic mass than iodine even though tellurium acts like it has a lower atomic mass.

Part of one row of the periodic table is shown.