11/12 Quiz

In the modern periodic table elements are arranged by:

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

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Beryllium is in group number______.

• Group 2
• Group 3
• Group 4
• Group 7

The period for Bromine is ___________.

• 3
• 2
• 4

Which element is found in group 16 period 3?

• Sulfur (S)
• Selenium (Se)
• Chlorine (Cl)
• Carbon (C)

How did Mendeleev arrange the elements?

• alphabetical 
• density
• melting point
• atomic mass

A rule that states that repeating chemical and physical properties of elements change periodically with the atomic number of the elements is the _________.

• periodic law
• alkaline-earth metals
• actinide
• group rule

Who invented the Periodic Table?

• Mendeleev

• Bohr

• Lewis

• Democritus

Mendeleev's genius was his ability to

• predict elements that were not discovered yet

• organize elements by their mass

• had an element named after himself

• organize elements by properties