For FUN!

Watch this video to memorize the elements of the periodic table:

Grabbing Atoms

• Using a scanning tunneling microscope, scientists can actually "grab" a single atom or a small group of atoms.
• For fun, IBM engineers made "Molecule Man, which was made of 28 two-atom groups placed on a platinum surface.
• Molecule Man is only 5 billionths of a meter tall!

Seeing Atoms

• Electron microscopes use electron beams to produce images of atoms. (1932)
• Field ion microscopes (1951) are similar to electron microscopes but use ions (charged particles) instead of electrons.
• Scanning tunneling microscope can scan samples using a very fine metallic tip.
• One-angstrom microscope confirms patterns in metals and crystals.

Periodic Table of Elements

Who made it

• Dmitri Mendeleev discovered the Periodic Table of Elements.

What it represents

Carbon is a solid at room temperature.

Bromine is a liquid at room temperature.

This is a helium atom.  Helium is a gas at room temperature.

• The columns represent groups, or families. Families of elements has similar properties.
• The rows represent periods.
• Metals, metalloids, and nonmetals represent three colors.
• The elements go in ascending order by atomic number.

The Properties of Elements

Metals

• Metals conduct heat and electricity.
• Metals make up more than 75% of the elements on the Periodic Table of Elements.
• Metals are shiny when polished.
• When at room temperature, metals are solid.
• Metals can be flattened or bent without breaking.

Nonmetals

• Nonmetals are poor conductors of heat and electricity.
• Nonmetals don't shine when polished.
• There are 17 nonmetals.

  Metalloids

• Metalloids are called semi-metals sometimes.

• Metalloids have some properties of metals and nonmetals.

  Noble Gases

• Noble gases don't react well with other elements.
• Noble gases are nonmetals.
• Noble gases are inert, or in the state of doing nothing.

Classifying Elements

Atoms

• Atoms can be made up of Protons, Neutrons, and Electrons
• A Proton has a positive charge.
• An Electron has a negative charge.
• A Neutron has a neutral charge.
• Atomic weight can be found by adding the number of protons and neutrons together.

Molecules

• Particles made up of more than one atom joined together is a molecule.
• Molecules make up many different substances.