Classifying Elements

What particles do atoms contain?

• Protons and Electrons
• Nucleus, Protons and Electrons
• Protons, Electrons and Neutrons
• I don't know

Electrons and neutrons are in the nucleus.

• True
• False
• I don't know.

All atoms have the same number of protons and electrons.

• True
• False
• I don't know.

The number of protons is called ...

• Atomic Mass
• Atomic Weight
• Atomic Number
• I don't know.

Who created the periodic table in 1869?

• Dimitri Mendoza
• Dimitri Mendeleev
• Dimitri Obama
• I don't know.

On the periodic table, the elements are arranged in decreasing atomic numbers.

• True
• False
• I don't know.

Elements can be classified as ...

• Metals
• Metalloids
• Non-metals
• All of the above.

Non-metals are great conductors of heat and electricity.

• True
• False
• I don't know.

Elements are made of a lot of different atoms.

• True
• False
• I don't know.

All atoms have the _______ number of protons and electrons.

• Same
• Different
• I am not sure.