Physical/Chemical Properties & the Periodic Table

Atomic Mass

• The mass of the electron cloud

• The mass of a chemical element (protons + neutrons)

• The small, dense part of an atom.

• The outermost electrons in the electron shell.

In the modern periodic table elements are arranged by:

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

Using the picture from a periodic table, what is the Atomic Number?

• 26

• Fe

• 55.845

• 56

Elements in the same column of the periodic table always have the same # of _______ as one another.

• Protons
• Neutrons
• Electrons
• Valence Electrons

What is located in the nucleus of an atom?

• protons and neutrons

• protons and electrons

• electrons and neutrons

What is located on the horizontal rows on the Periodic Table?

• families

• groups

• periods

In which direction would you find groups/families?

• horizontal

• vertical

How are symbols for elements written?

• numbers

• pictures

• letters

What is the symbol for carbon?

• Ca

• C

• Na

H is the symbol for____.

• Helium

• Hydrogen

• Iron