Bellringer Bellringer: Element or Compound? Can be broken down into a simpler substance through chemical means He Two or more different atoms chemically combined NaCl Found on the periodic table

Today’s Agenda… Element Quizzes/Bellringer Review Periodic Table BrainPop on Periodic Table Review Organizing the Elements WS (Study Pack #5) Notes on Metals (Study Pack #6)

Review How are the elements on the periodic table arranged? What information can be gained by looking at each element on the periodic table? What does atomic number and atomic mass differ? What are the columns on the periodic table called? What are the rows on the periodic table called? How do we know if one element is similar to another?

Why the table works Recall that protons and neutrons are in the nucleus and electrons are outside of the nucleus Electrons explain why some atoms bond to others to create compounds

Why the table works Electrons in the outer part of the atom are called valence electrons These electrons are shared or transferred when atoms of elements come together to make compounds

Why the table works Elements have different numbers of valence electrons Valence electrons increase from left to right on the periodic table Elements in each group (or family) have the same number or arrangement of valence electrons

Today’s Goals… I can describe metals using their physical and chemical properties

Metals on the Periodic Table Left of the zigzag line

Physical Properties What is a physical property? Hardness Shininess

Physical Properties Malleability – how well it can be pounded into shapes Ductility – how well it can be made into wire Example: Copper is both malleable and ductile

Physical Properties Conductors Magnetic State of matter All are solid except mercury

Chemical Properties What is a chemical property? Reactivity – if and how quickly it combines with other elements and compounds Some metals react explosively when combined with other elements and compounds

Chemical Properties Some metals react with air as rust forms Some metals tarnish

Metals in the Periodic Table Alkali Metals Alkaline Earth Metals Transition Metals Mixed Group Lanthanides and Actinides The metals in these groups have similar properties to each other Change gradually as you move across the periodic table

Alkali Metals Group 1 Very reactive so they are found only in compounds Soft and shiny Could cut them with a plastic knife! Examples: Na – found in salt Li – found in batteries

Alkaline Earth Metals Group 2 Also found only in compounds Fairly hard Grey-white Good conductors of electricity Examples: Mg – once found in flash bulbs Ca – found in your bones

Transition Metals Groups 3-12 Even though they are in different families they are very similar to each other Contains most of the familiar metals Hard and shiny Some have unusual colors

Transition Metals Good conductors of electricity React slowly or not at all with air and water Examples: Au – coins and jewelry Fe – in your body

Mixed Group Groups 13-16 Also contains nonmetals and metalloids Not as reactive as those on the left side Examples: Al Lead – automobile batteries

Lanthanides and Actinides At the bottom of the periodic table Also known as rare earth elements Soft and malleable Shiny High conductivity Examples: U – used in nuclear power plants

Homework Retests on Thursday Work on items on Study Contract