Periodic Table Basics

Front

What does the atomic number represent in an atom?

Back

The atomic number represents the number of protons in an atom.

Front

Which group of the periodic table contains inert gases?

Back

Noble gases.

Front

How are elements arranged in the modern periodic table?

Back

Elements are arranged by atomic number.

Front

How many groups or families are there in the periodic table?

Back

There are 18 groups/families in the periodic table.

Front

What are alkali metals?

Back

Alkali metals are the elements in Group 1 of the periodic table, known for being highly reactive.

Front

What are alkaline earth metals?

Back

Alkaline earth metals are the elements in Group 2 of the periodic table, known for being reactive but less so than alkali metals.

Front

What are halogens?

Back

Halogens are the elements in Group 17 of the periodic table, known for being very reactive nonmetals.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically with other elements.

Front

What is a period in the periodic table?

Back

A period is a horizontal row in the periodic table, indicating the number of electron shells an atom has.

Front

What is a group in the periodic table?

Back

A group is a vertical column in the periodic table, indicating elements with similar chemical properties.