Periodic Table Chapter 6, Element song Mendeleev vs Modern Table

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Presentation transcript:

Periodic Table Chapter 6, Element song Mendeleev vs Modern Table Classes of Elements E- configuration in the table Periodic Trends

History behind the Periodic Table Intro to Mendeleev’s work

Metals and Nonmetals The difference between metals and nonmetals (VIDEO)

More differences between Metals and Nonmetals Elements that have 1 to 3 valence electrons have metallic properties and are called metals. Elements that have 4 to 7 valence electrons are called nonmetals. Most elements we know as metals are in the ‘transition metal zone’ of the periodic chart.

Classes in the P T Color in the blank chart: alkali metals, alkaline metals, transition metals, metalloids, halogens, noble gases, actinides, lanthanides (inner transition). Representative elements are in groups 1A-7A & have varied physical & chemical properties. In these the highest s &p sublevels are not filled. Group # = # e- in hihgest occupied energy level.

Trends in the Periodic Table Ionization Energy: the energy it takes to remove the first electron from the outer shell of an atom Video Atomic Radius in the Table Video Electron affinity: opposite of ionization energy, is how much an atom wants an electron. Electronegativity: the ability of an atom to hold electrons tightly Yet another video on radii, ionization & electronegativity trends (w/history!)

The ionization trend in the PT is opposite to the atomic radius trend. At the end of this video there are practice questions. In the next slide are trends to compare with diagram in your book on pg 182.

Arrangement of the periodic table also accounts for other trends. Ionization Energy (Amount of energy needed to remove one electron) Increases from left to right and bottom to top Atomic Size of Elements Decreases from left to right and bottom to top Periodic Trends