Development of the periodic table

Front

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

Back

By atomic mass.

Front

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

Back

The atomic number.

Front

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

Back

Atomic number.

Front

What does atomic mass represent in an element?

Back

The number of protons and neutrons in its nucleus.

Front

How did Mendeleev arrange the elements in his periodic table?

Back

By their properties and atomic mass, not in alphabetical order.

Front

What is the significance of the atomic number in the periodic table?

Back

It determines the identity of an element and its position in the periodic table.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the total number of protons and neutrons, while atomic number is the number of protons.

Front

What is the periodic law?

Back

The properties of elements are a periodic function of their atomic numbers.

Front

Who is credited with the creation of the first widely recognized periodic table?

Back

Dmitri Mendeleev.

Front

What is the role of groups in the periodic table?

Back

Elements in the same group have similar chemical properties.