Exploring the Periodic Table

Who is known for creating the first periodic table?

• Albert Einstein

• Isaac Newton

• Dmitri Mendeleev

• Marie Curie

How many groups are there in the periodic table?

• 12

• 16

• 18

• 20

What do elements in the same group have in common?

• They have the same number of valence electrons.

• They have the same atomic mass.

• They are all gases at room temperature.

• They have identical chemical properties.

What is the significance of periods in the periodic table?

• Periods represent the atomic number of elements.

• Periods are used to categorize metals and nonmetals.

• Periods indicate the number of protons in an atom.

• Periods indicate the number of electron shells and show trends in elemental properties.

How many periods are there in the periodic table?

• 5

• 10

• 12

• 7

Which element is represented by the symbol 'Fe'?

• Gold

• Iron

• Lead

• Copper