'Lanthanides' diaporamas de présentation

Chapter 7 The Structure of Atoms and Periodic Trends

Chapter 7 The Structure of Atoms and Periodic Trends. Arrangement of Electrons in Atoms. Electrons in atoms are arranged as SHELLS (n) SUBSHELLS ( l ) ORBITALS (m l ). Electrons in Shells. The number of shells increases with the shell value (n).

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Periodic Table

Periodic Table. Larry Scheffler Lincoln High School. The Periodic Table-Key Questions. What is the periodic table ? What information is obtained from the table ? How can elemental properties be predicted based on the Periodic Table ?.

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Element Guide

Element Guide. Atomic Number : number of protons which is equal to the number of electrons. 2. Element Symbol. He. 4. Atomic Mass Number = The number of protons + the number of neutrons. The Periodic Table.

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Periodic Table

Periodic Table. The how and why. History. 1829 German J. W. Dobereiner Grouped elements into triads Three elements with similar properties Properties followed a pattern The same element was in the middle of all trends Example: Ca, Ba, Sr Not all elements had triads.

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Introduction to the Periodic Table

Introduction to the Periodic Table. Dmitri Mendeleev. The elements were first arranged in the periodic ta ble in 1869 by Dmitri Mendeleev.

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Chapter 4

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Instructions:

18. 1. H. He. H 1. 2. 13. 14. 15. 16. 17. C. O. B. N. Ne. F. Be. Li. S. P. Cl. Ar. Na. Al. Mg. Si. He 2. Br. K. As. Se. Ga. Ge. Kr. Ca. In. Sb. Sn. Te. I. Xe. Rb. Sr. Li 3. Be 4. N 7. O 8. F 9. Ne 10. Th. Pb. Po. Rn. Bi. At. Ba. Cs.

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PERIODIC TABLE OF ELEMENTS

PERIODIC TABLE OF ELEMENTS. DR. AUGUSTINE OFORI AGYEMAN Assistant professor of chemistry Department of natural sciences Clayton state university. PERIODIC TABLE OF ELEMENTS. Group. Alkali Metals (Group 1A). Period. PERIODIC TABLE OF ELEMENTS. Group. Alkaline Earth Metals (Group 2A).

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The Groups of the Periodic Table

The Groups of the Periodic Table. Group 1: The Alkali Metals. Have a ns 1 configuration Form + 1 cations Have only 1 valence electron Reactivity increases down the column; reacts violently with H 2 O. Forms basic compounds . alkali.mp4. Group 2: Alkali Earth Metals.

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