Periodic Table Basics

Front

What is the number at the bottom of each square on the periodic table?

Back

The atomic mass of the element.

Front

What are the vertical columns on the periodic table called?

Back

Groups.

Front

How are groups on the periodic table arranged?

Back

They are arranged in vertical columns.

Front

What is the name of the element with the symbol 'Na'?

Back

Sodium.

Front

What class of elements is sometimes called 'semiconductors'?

Back

Metalloids.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What are the horizontal rows on the periodic table called?

Back

Periods.

Front

What is the chemical symbol for magnesium?

Back

Mg.

Front

What distinguishes metals from nonmetals on the periodic table?

Back

Metals are typically good conductors of heat and electricity, while nonmetals are not.

Front

What is the significance of the periodic table's arrangement?

Back

Elements are arranged by increasing atomic number, which reflects their properties.