Periodic Table Metals

Atomic Structure All atoms have 3 parts: Protons (+) Neutrons (0) Electrons (-) Protons and neutrons are found in the nucleus. Electrons are found moving around the nucleus on rings, (orbitals, shells)

Atomic Number tells you the number of protons Atomic Mass tells you the number of protons + the number of neutrons Sooo…the number neutrons = atomic mass minus atomic number Generally….the number of protons = the number of electrons.

1. How many protons does Boron (B) have? 2. How many neutrons does Argon (Ar) have? 22 neutrons 3. How many electrons does Sodium have (Na)? 11 electrons

Cards

What is a metal? What words describe a metal? Chemists classify metals according to their properties such as: hardness shininess malleability conductivity ductility

Hardness – describes how well a material is resistant to scratching. Shininess (luster) – describes how light reflects off a material.

Malleable – describes how well a material can be pounded into a shape or sheet. Ductile – describes how well a material can be pulled out or drawn into a wire.

Conductivity - the ability to transfer heat or electricity. Thermal conductivity – transferring heat Electrical conductivity – transferring electricity Most metals have good conductivity. Wood bad … metal good!

Metals in the periodic table Alkali metals All the elements in group 1. Examples: lithium(Li), sodium (Na) and potassium (K) These are the most reactive of all metals In nature, they are always found in compounds In a laboratory, they can be pure and are soft and shiny

Sodium Potasium Lithium

Metals in the Periodic Table Alkaline metals All the elements in group 2 Examples are Magnesium (Mg) and Calcium (Ca) Harder and denser than group 1

Magnesium

Metals in the Periodic Table Transition metals Elements in groups 3-12 Examples are iron (Fe), and gold (Au) They are fairly stable