Development of the periodic table

Front

What are the elements on the right side of the 'stair-step' line on the periodic table classified as?

Back

Nonmetals

Front

What is the primary tool used to arrange elements in the modern periodic table?

Back

Atomic number

Front

How did John Newlands organize his elements in the periodic table?

Back

By atomic mass

Front

What was Dmitri Mendeleev's most significant contribution to the periodic table?

Back

He predicted the existence (and properties) of new elements.

Front

What does the number at the top of an element's square in the periodic table signify?

Back

Atomic number

Front

What are the main categories of elements in the periodic table?

Back

Metals, nonmetals, and metalloids.

Front

What is the significance of the periodic law?

Back

The properties of elements are periodic functions of their atomic numbers.

Front

Who is known as the father of the periodic table?

Back

Dmitri Mendeleev

Front

What is the difference between groups and periods in the periodic table?

Back

Groups are vertical columns, while periods are horizontal rows.

Front

What is a metalloid?

Back

Elements that have properties of both metals and nonmetals.