d and f BLOCK ELEMENTS

What names did Mendeleev give to the undiscovered elements he predicted?

• Proto-aluminium and Proto-silicon
• Meta-aluminium and Meta-silicon
• Novus-aluminium and Novus-silicon
• Eka-aluminium and Eka-silicon

What did Mendeleev do when he found elements that didn't fit his scheme based on atomic weight?

• He created a new category for them.
• He placed them in a separate table.
• He re-measured their atomic weights himself.
• He ignored the order of atomic weights and grouped elements with similar properties.

What is the basis of Mendeleev's Periodic Law?

• The properties of the elements are a periodic function of their atomic numbers.
• The properties of the elements are a periodic function of their atomic weights.
• Elements are arranged based on their electron configurations.
• Elements are grouped according to their valence electrons.

Who is generally credited with developing the Modern Periodic Table?

• Lothar Meyer
• John Newlands
• Jons Jakob Berzelius
• Dmitri Mendeleev

What is the main reason the Periodic Table is considered one of the greatest achievements in chemistry?

• It lists all known elements
• It is easy to memorize
• It provides a framework for understanding and predicting the properties of all elements
• It was created by a single scientist