Understanding the Periodic Table

What do elements in the same group of the periodic table have in common?

• They have the same atomic number.

• They have the same number of protons.

• They have the same number of valence electrons.

• They have the same atomic mass.

Why are alkali metals more reactive than alkaline earth metals?

• They have more protons.

• They have fewer electrons in their outer shell.

• They have a higher atomic mass.

• They are located further to the right on the periodic table.

Which property is NOT typical of transition metals?

• Excellent conductivity

• High melting and boiling points

• Lack of reactivity

• Ability to form colored compounds

What is a characteristic reaction of halogens?

• Forming alkali solutions

• Displacement reactions

• Corrosion resistance

• High melting points

Why are noble gases considered stable?

• They have a full outer electron shell.

• They have a high atomic number.

• They are located in the middle of the periodic table.

• They can easily form compounds.