Development of the Modern Periodic Table

Front

First to arrange elements by atomic number:

Back

Henry Moseley

Front

Rows on the periodic table are called:

Back

Periods

Front

Term for columns in the periodic table?

Back

Groups

Front

Location of representative elements on the periodic table

Back

Groups 1, 2, and 13–18

Front

Silicon and germanium are examples of...

Back

metalloids