The Periodic Table

What is the chemical symbol for Sodium?

• Na

• S

• K

• Ca

Which category does Silicon belong to?

• Metal

• Metalloid

• Nonmetal

What is the background color for nonmetals in the periodic table?

• Gray

• Blue

• Green

• Yellow

Which of the following is a liquid at room temperature?

• Na

• Hg

• He

What is the chemical symbol for the element with atomic number 8?

• O

• C

• N

• H

What is an atom?

• A basic unit of matter

• A type of molecule

• A chemical reaction

• A form of energy

How many hydrogen and oxygen atoms are in water (H₂O)?

• 1 hydrogen, 1 oxygen

• 2 hydrogen, 1 oxygen

• 1 hydrogen, 2 oxygen

• 2 hydrogen, 2 oxygen

Who first named the atom?

• John Dalton

• Democritus

• Dmitri Mendeleev

Who proposed the Solid Sphere model of the atom in 1803?

• Democritus

• Dmitri Mendeleev

• John Dalton

Dmitri Mendeleev developed the first periodic table of elements, organized by ________.

• atomic mass

• atomic number

• electron configuration

• density