Grade 7 Periodic Table Quiz

What are the vertical columns in the periodic table called?

• Rows

• Periods

• Groups

• Sections

What are the horizontal rows in the periodic table called?

• Groups

• Periods

• Columns

• Categories

What do elements in the same group have in common?

• They have the same number of protons.

• They have similar physical and chemical properties.

• They have the same atomic mass.

• They belong to the same period.

Which of the following statements about periods in the periodic table is true?

• They are arranged vertically.

• They have elements with the same chemical properties.

• They do not have similar properties.

• They contain only metals.

The elements in the periodic table are arranged based on their:

• Atomic mass

• Number of electrons

• Atomic number

• Chemical properties

What does the atomic number of an element represent?

• The total number of neutrons

• The number of protons in an atom

• The total weight of the atom

• The number of electron shells

What does the atomic mass of an element represent?

• The number of protons

• The sum of protons and neutrons

• The total number of electrons

• The total number of atoms

Which of these elements has the atomic number 3?

• Oxygen

• Lithium

• Sulfur

• Potassium

What is the atomic number of oxygen (O)?

• 6

• 8

• 12

• 16

What is the symbol for sodium?

• S

• Na

• Mg

• K