2 Periodic Periodic means “happening at regular intervals” The days of the week are periodicRepeating pattern**Name some Periodic things in your life -Mendeleev found that the elements’ properties followed a pattern that repeated every seven elementsHe used the repeating pattern of properties to predict the properties of new, undiscovered elements.
3 Periodic LawThe law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
4 Periodic Table InfoEach square on the periodic table shows Name, Symbol, Atomic Number, and average Atomic MassElement Symbols are shown in different colors – shows the state of matter at normal room temperature.Symbols are universal – same in all countriesFirst letter is always capitalized, second letter is always lowercase.
5 Arrangement of Per. Table Rows are called periods – the pattern of properties repeats with each periodColumns are called a group or family – each element in a family shares similar characteristics or properties
7 Alkali Metals Group 1 of the periodic table The most reactive metals because they can easily give away their one outer level electronSo reactive that they are Only found combined with other elements in natureShared properties include: softness, color, shininess, low density
8 Alkaline-Earth Metals Group 2 on the periodic table2 outer level electrons – less reactive than alkali metalsShared properties include: color, higher density than alkali
9 Transition metals Groups 3-12 on the periodic table Very rarely react with other elementsProperties shared: shininess, good conductors, higher densities and melting points than elements in groups 1 or 2Family 11 also called coinage metals (gold, silver, copper)
10 Boron Group Group 13 on Periodic Table Family contains 1 metalloid and 5 metalsReactiveSolids at room temperatureAll have 3 electrons in outer level
11 Carbon Group Group 14 on Periodic Table All have 4 electrons in their outer levelAll solids at room temperature
12 Nitrogen Group Family 15 on the Periodic Table All have 5 electrons in their outer energy level2 nonmetals, 2 metalloids, and 2 metalsSolid at room temp (except Nitrogen)
13 Oxygen Group Family 16 on the Periodic Table All have 6 electrons in outer energy levelReactive3 nonmetals, one metalloid, and one metalAll but Oxygen are solid at room temp.
14 Halogens All Nonmetals Family 17 on Periodic Table Very reactive Poor conductors of electricity.Violent reactions with alkali metals to form salts
15 Noble Gases Family 18 on Periodic Table 8 electrons in outer level Totally unreactiveColorless, odorless gases at room temp