Periodic table

• Periods

• Groups

• Same group

• Same period

How did Mendeleev arrange the elements?

• by proton number

• density

• melting point

• atomic mass

A vertical column is called...

• group

• tower

• period

• crew

The blue atoms are called 

• metals

• nonmetals

• metalloids

• noble gases

The atomic number tells you what?

• number of electrons

• number of protons

• number of neutrons

• both electrons and protons in an atom.

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Neptune

Which is an alkali metal?

• Magnesium

• Iron

• Sodium

• Europium

The periodic table is arranged in order of...

• increasing atomic number

• increasing atomic mass

• decreasing atomic mass

• decreasing atomic number

At room temperature, most elements are classified as...

• non-metal

• metal

• mettalloids

• halogens