Periodic Table

Front

What are the elements in Group 18 of the periodic table called?

Back

Noble gases.

Front

Which group of elements exists as single atoms rather than molecules because they aren't reactive?

Back

Noble gases.

Front

Which type of elements tend to be good conductors of heat and electricity?

Back

Metals.

Front

What did Mendeleev start when properties of elements repeated?

Back

A new row.

Front

What do similar valence electrons indicate about elements?

Back

They have similar chemical properties.

Front

What is the term for the vertical columns in the periodic table?

Back

Groups or families.

Front

What is the term for the horizontal rows in the periodic table?

Back

Periods.

Front

What are the elements in Group 17 of the periodic table called?

Back

Halogens.

Front

What is the main characteristic of alkali metals?

Back

They are highly reactive and have one valence electron.

Front

What is the main characteristic of alkaline earth metals?

Back

They are reactive but less so than alkali metals and have two valence electrons.