The Periodic Table

Who is credited with discovering the repeating patterns in elements that led to the creation of the periodic table?

• Isaac Newton

• Marie Curie

• Dmitri Mendeleev

• Albert Einstein

What does the period number of an element tell us?

• The number of valence electrons

• The number of neutrons in the atom

• The number of energy shells for electrons

• The number of protons in the atom

What are valence electrons responsible for?

• Determining the size of the atom

• Determining the chemical behavior of the element

• Determining the atomic mass of the element

• Determining the number of protons in the nucleus

Why are noble gases considered stable?

• They are the smallest elements

• They have no electrons

• They have a full outer shell of electrons

• They have one valence electron

What is the main goal of an atom according to the octet rule?

• To have the same number of protons and electrons

• To achieve a full outer shell of electrons

• To lose all its electrons

• To gain as many electrons as possible