Sc.8.P.8.6

Mendeleev’s periodic table did not always list elements in order of increasing

atomic mass because he grouped together elements with similar

• properties.

• atomic numbers.

• densities.

• colors

Mendeleev predicted that the gaps in his periodic table represented

• isotopes.

• radioactive elements.

• permanent gaps.

• undiscovered elements.

Elements in the Periodic Table are arranged according to their

• atomic number

• atomic mass

• relative activity

• relative size

The elements in the Periodic Table are arranged in order of increasing

• atomic number

• atomic radius

• mass number

• neutron number

   Most of the elements (85%) in the periodic table are.

• a. metals..
• b. metalloids
• c. gases.
• d. nonmetals.
  

 Mendeleev arranged the elements by

• a. density.
• b. melting point.
• c. appearance.
• d. increasing atomic mass.

  Another way the periodic table is organized is by…

• a. metals and non-metals 
• b. metals, non-metals, and metalloids
• c. non-metals and metalloids
• d. none of the above

  How is the Periodic Table of Elements arranged today?

• a. by the type of element
• b. by the state of the element (solid, liquid, or gas)
• c. the mass of the element
• d. all of the above

What does the atomic number tell us?

• A.  number of neutrons
• B. mass of atom
• C. number of protons
• D. name of element

How would you describe most metals?

• A. They are easily shattered
• B. They are bad conductors
• C. They are dull
• D. They are good conductors of heat and electricity