Understanding the Periodic Table

Who is credited with organizing the periodic table as we know it today?

• Marie Curie

• Isaac Newton

• Dimitri Mendeleev

• Albert Einstein

What does the atomic number of an element represent?

• The average mass of the atom

• The number of neutrons in an atom

• The number of protons in an atom

• The total number of electrons and protons

How do you calculate the number of neutrons in an atom?

• Subtract the atomic number from the mass number

• Add the atomic number to the mass number

• Multiply the atomic number by the mass number

• Divide the mass number by the atomic number

What is the maximum number of electrons that can be found in the outermost energy level of an atom?

• 6

• 8

• 2

• 4

What is the term for the outermost shell of electrons in an atom?

• Proton shell

• Nucleus

• Valence shell

• Core shell

Which group of elements is known for having a complete outer energy level?

• Alkali metals

• Halogens

• Noble gases

• Transition metals

What is the valence number of elements in the first column of the periodic table?

• -1

• +2

• 0

• +1

Which of the following is a property of metalloids?

• They are all gases at room temperature

• They have properties of both metals and non-metals

• They are highly reactive with water

• They are poor conductors of electricity

What type of compound is formed when a metal and a non-metal combine?

• Organic compound

• Ionic compound

• Covalent compound

• Metallic compound

Which of the following elements is a non-metal?

• Sodium

• Chlorine

• Aluminum

• Copper