Hunting the Elements

Front

Oxygen makes up ______________________ % of our atmosphere.

Back

21%

Front

75% of the elements are _____________________.

Back

metals

Front

What six main elements are found in you and me? H N O P S (what is the missing element?)

Back

Carbon

Front

The group on the far right of the table, the ____________ gases, are unwilling to react with other elements.

Back

noble

Front

This group is in the first column. They all have full shells, plus one extra electron they desperately want to get rid of.

Back

alkali metals

Front

What are the two main categories of elements?

Back

Metals and Nonmetals

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements organized by atomic number, electron configuration, and recurring chemical properties.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What is the significance of noble gases in chemistry?

Back

They are chemically inert and do not readily react with other elements.

Front

What is an alkali metal?

Back

Any of the elements in group 1 of the periodic table, which are highly reactive.