The Periodic Table The periodic Table Invented in

The Periodic Table

The periodic Table Invented in the 1800’s by Medeleev http: //ed. ted. com/lessons/the-genius-of- mendeleev-s-periodic-table-lou-serico There are 3 very large groups: Metals Non-metals Metalloids (semi-metals)

Periodic Table Organization The horizontal rows are called periods. Elements in the same period have the same number of energy levels / electron shells Vertical columns of elements are called groups or families. Members of each group have similar physical and chemical properties because of the number of electrons in their outermost shell.

Group 1 – Alkali Metals

Chemical Group or Family Valence Electrons Group 1 1 – Alkali Metals (Li, Na, K, Rb, Cs, Fr) Common Physical Properties -solids -shiny silvery colour -soft metals Common Chemical Properties -Extremely reactive -React with water to produce hydrogen gas -Found in nature only as compounds -Lose 1 electron form +1 ions

Reactivity of Alkali Metals Video https: //www. youtube. com/watch? v= uixx. Jt. JPVXk

Group 2 – Alkaline Earth Metals

Chemical Group or Family Valence Electrons Group 2 2 – Alkaline Earth Metals (Be, Mg, Ca, Sr, Ba, Ra) Common Physical Properties Common Chemical Properties -solids -metals -more dense than group 1 -Very reactive -Found in nature only as compounds -Lose 2 electrons form +2 ions

Group 7 - Halogens

Chemical Group or Family Valence Electrons Group 7 7 – Halogens (F, Cl, Br, I, At) Common Physical Properties -Nonmetals -F - yellow gas -Cl - yellowgreen gas -Br - redbrown liquid -iodine violet/black solid -astatine radioactive solid Common Chemical Properties -Extremely Reactive -Very Corrosive -Found in nature only as compounds -gains 1 electron to form -1 ions

Group 8 – Noble Gases

Chemical Group or Family Valence Electrons Group 8 8 – Noble Gases (He, Ne, Ar, Kr, Xe, Rn) Common Physical Properties -Nonmetals -Gases at room temperature -Odourless, colourless, tasteless -stable electron structure Common Chemical Properties -Very stable -Unreactive because of full outer shell electrons. -Almost never combine with other elements. -Do not gain/lose electrons.

Other Groups Transition Metals The sunken block between groups 2 and 3. Lanthanides and Actinides Removed and found at the bottom of the periodic table. Lanthanides are elements 57 -70 Actinides are elements 89 -102 All very rare.

Facts Elements 1 -92 are naturally occurring. Elements 93 -102 are man made. Hydrogen is the misfit. Like the alkali metals it has 1 electron in its outermost shell, but has little else in common with this group.

Periodic Table Song! https: //www. youtube. com/watch? v=Vg. VQKCc fwn. U https: //www. youtube. com/watch? v=Odu. TDU Ge. AXE https: //www. youtube. com/watch? v=v 1 Tf. PDl. A 1 x. E

To Do / Homework 1. Colour your periodic table! 2. Answer the Questions on the back of your note 3. Complete any homework from last day: Atomic structure worksheet Bohr Rutherford diagrams worksheet Read text p. 245 -249