atoms and elements

What are the vertical columns on the periodic called?

• groups

• periods

• nonmetals

• metals

• metalloids

What are the horizontal rows on the periodic table called?

• periods

• groups

• metals

• nonmetals

• metalloids

What is the atomic mass?

• 58.693

• 28

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

What does 12.011 represent?

• atomic mass
• atomic number
• element name
• chemical symbol 

These are found on the Periodic Table.

• Compounds
• Elements
• Mixtures

• Periods
• Groups