Periodic Table (Honors)

How did Mendeleev order the elements in his periodic table?

• atomic mass
• atomic number
• electron configuration
• ionic number

How are elements ordered on the modern periodic table?

• atomic mass
• atomic number
• atomic weight
• ionic number

What characteristic makes each element unique?

• the number of electrons
• the number of protons
• the number of neutrons
• the number of valence electrons

What information in the periodic table indicates the number of protons in an atom?

• atomic mass
• atomic number
• element symbol
• group number

The average number of protons and neutrons in the nucleus of an atom for a specific element is known as the...

• atomic number
• atomic mass
• ionic number
• valence electrons

Vertical columns of elements in the periodic table are called...

• groups
• periods
• ions
• isotopes

Horizontal rows of elements in the periodic table are called...

• groups
• periods
• ions
• isotopes

Sometimes, scientists refer to elements in the same group of the periodic table as _____ because they share similar properties.

• "families"
• "periods"
• "isotopes"
• "ions"

Electrons that are located farthest from the nucleus in the "outer shell" of the atom that determine chemical bonds are called...

• valence electrons
• ions
• isotopes
• positrons

The periodic table is organized into blocks because...

• the atomic mass skips some numbers
• there are some undiscovered elements in the missing blocks
• the number of protons varies based on the energy level
• each energy level holds a certain number of electrons