Introduction to the Periodic Table

Who was the scientist that played a key role in developing the periodic table?

• Albert Einstein

• Dmitri Mendeleev

• Marie Curie

• Isaac Newton

What did Mendeleev realize about the periodic table that others did not?

• It was a perfect circle

• It had gaps for undiscovered elements

• It was made of gold

• It was a map of the world

Which group of elements is known for being extremely reactive and shiny?

• Halogens

• Transition metals

• Alkali metals

• Noble gases

What are the middle elements of the periodic table called?

• alkali metals

• alkaline earth metals

• transition metals

• noble gases

What are the gases almost at the end called that love to react with the alkali metals at the beginning of the table?

• nonmetals

• noble gases

• actinides

• halogens

What is the main characteristic of noble gases?

• They are completely unreactive

• They are liquid at room temperature

• They are very reactive

• They are metals

What did Mendeleev believe about the periodic table?

• It was a joke

• It had cosmic importance

• It had no significance

• It was a simple list

How is our modern periodic table arranged?

• in terms of protons

• in terms of electrons

• in terms of neutrons

• in terms of mass