Periodic Table

Front

On the periodic table, the horizontal rows are called

Back

Periods

Front

Elements in group 17 are called

Back

Halogens

Front

Who is credited with organizing the first periodic table by arranging the elements by mass?

Back

Mendeleev

Front

Halogens tend to form which ionic charge?

Back

-1

Front

Noble gases are extremely reactive

Back

False

Front

What are the vertical columns in the periodic table called?

Back

Groups

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What do elements in the same group have in common?

Back

They have similar chemical properties.

Front

What is the significance of the periodic law?

Back

It states that the properties of elements are a periodic function of their atomic numbers.

Front

What are alkali metals?

Back

Elements in group 1 of the periodic table, highly reactive and have one electron in their outer shell.