Periodic Table

Front

What are the horizontal rows on the periodic table called?

Back

Periods

Front

What do the vertical columns on the periodic table tell us?

Back

The number of valence electrons (electrons on the outermost shell)

Front

This element has two valence electrons and two energy levels. What is it?

Back

Beryllium (Be)

Front

Who discovered the electrons?

Back

Thomson

Front

Who discovered the nucleus?

Back

Rutherford

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What are groups in the periodic table?

Back

Vertical columns that group elements with similar chemical properties.

Front

What is a metalloid?

Back

Elements that have properties of both metals and nonmetals.

Front

What is the most abundant element in the universe?

Back

Hydrogen (H)