Chemistry Part 5 More on Atoms and Ions.

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Presentation transcript:

Chemistry Part 5 More on Atoms and Ions

Practice What is the number of protons for Cobalt? 27

Practice What is the atomic mass for Strontium? 87.62

Practice What is the number of neutrons for Germanium? 73 – 32 41

Practice Draw a Bohr diagram for a Lithium atom.

Practice Draw a Lewis diagram for a Lithium atom.

Practice Draw a Bohr diagram for a Fluorine atom.

Practice Draw a Lewis diagram for a Fluorine atom.

Practice Which atom is in period 2, group 15? Nitrogen

Practice Which atom is in period 5, group 11? Silver

Practice Which group number can you find the alkaline earth metals?

Remember: Cation: Positively charged ion. Most metals. Use atom name. When an atom loses electrons it is a positive ion.

Ions Anion: Negatively charged ion. Most non-metals. Use “ide”. When an atom gains electrons it is a negative ion.

Practice Draw a Lewis diagram for a Lithium ion.

Practice Draw a Lewis diagram for a Fluoride ion.

Practice What is the name for As3- ? Arsenide ion

Practice What is the name for Mg2+ ? Magnesium ion.

Practice Determine the charge for an Aluminum ion. Al3+

Practice Determine the charge for a Sulfide ion. S2-

Practice Worksheet Page 97 # 11 – 15, 18, 19, 21 Page 109 # 4, 9