Periodic Table Basics

Front

Rows on the periodic table are called ___________.

Back

Periods

Front

Periods on the periodic table are __________.

Back

Horizontal Rows

Front

Vertical columns on the periodic table are called ___?

Back

Groups

Front

Who developed the first periodic table in 1869?

Back

Dmitri Mendeleev

Front

In the periodic table, similar elements are arranged in vertical columns called groups. What are the major groups?

Back

Group 1: Alkali metals; Group 2: Alkaline earth metals; Group 17: Halogens; Group 18: Noble gases.

Front

In what direction are groups arranged in the periodic table?

Back

Up and down.

Front

What is the modern periodic table organized by?

Back

Atomic number.

Front

What do elements in the same group have in common?

Back

Similar properties and characteristic behaviors due to similar numbers of valence electrons.

Front

What is the significance of Mendeleev's periodic table?

Back

He organized elements according to atomic weight and noticed patterns of repeating properties.

Front

What are alkali metals?

Back

Elements in Group 1 of the periodic table, known for being highly reactive.