The Chemistry of Life Electron Configuration & practice with the Periodic Table.

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Presentation transcript:

The Chemistry of Life Electron Configuration & practice with the Periodic Table

Draw the electron configuration for the following elements as they would appear on the periodic table. Then decide if it is stable Yes / No.

An atom with 3 electrons. Is it stable? No

An atom with 7 electrons. Is it stable? No

An atom with 18 electrons. Is it stable? Yes

An atom with 11 electrons. Is it stable? No

An atom with 2 electrons. Is it stable? Yes

An atom with 14 electrons. Is it stable? No

What numbers of valance electrons make an element stable? What numbers of valance electrons make an element want to be a positive ion? What numbers of valance electrons make an element want to be a negative ion? 8,2 1,2,3 5,6,7

Look at the element pictured below. Draw the element so that it is an isotope. Element Isotope 35 See same P and E but different N. 35

Periodic table and bonding… again 1. What is the symbol for Hydrogen? __________________________ 2. What element is W? _________________________ 3. What is the symbol for Sulfur? __________________________ 4. What period id Ar in? _________________________ What row? __________________________ H Tungsten S 18 3

5. What element is O?___________________ Write how O appears in nature most often ________________ As it appears in nature is it a molecule or a compound? __________________ 6. What type of element is Fe? _____________________________________ 7. What is the atomic number of Gold? _____ The atomic mass? __________ How many Protons does it have? _____ Neutrons? _______ Electrons? _____ Oxygen O2O2 Molecule Metal (b/c it is Iron)

8. How many valance electrons does Cesium have? ______________ 9. Will Carbon more likely form Ionic or covalent bonds? ______________ Explain your answer using the number of valance electrons it has. 10. Will Lithium more likely form Ionic or covalent bonds? ______________ Explain your answer using the number of valance electrons it has. 11. Will Hydrogen more likely form Ionic or covalent bonds?_________________ Explain your answer using the number of valance electrons it has. 1 Covalent It has 4 V.E. & it is hard to steal 4 more so it shares. Ionic loses 1 V.E. the next ring is full easier to lose 1 than get 7 Covalent loses its electron it will only be a proton so it shares.

Draw Ions Draw a representation of the 1+ ion for Lithium. Draw a representation of the 2- for Sulfur. Draw a representation of the 3+ ion for Aluminum. Li 1- s 2-s 2- Al 3+