Periodic Table of the Elements

Front

Most of the elements on the periodic table are classified as _____

Back

Metals

Front

An element's identity is determined by the number of _____

Back

protons.

Front

These elements located on the 'stair-step' line are sometimes called 'semiconductors.'

Back

Metalloids

Front

Elements in the same period have the same number of _____

Back

energy levels.

Front

The number at the top of each square on the periodic table is the _____

Back

atomic number.

Front

What are the three main categories of elements on the periodic table?

Back

Metals, Nonmetals, and Metalloids.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What do you call elements that have properties of both metals and nonmetals?

Back

Metalloids.

Front

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

Back

Elements are arranged by increasing atomic number and similar properties.

Front

What are valence electrons?

Back

Electrons in the outermost energy level of an atom.