Topic 2 Atomic Structure - Coral Gables Senior High...2016/07/21 · Topic 2 Atomic Structure IB...
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Topic 2 Atomic Structure IB Chemistry SL Coral Gables Senior High School Ms. Kiely
Transcript of Topic 2 Atomic Structure - Coral Gables Senior High...2016/07/21 · Topic 2 Atomic Structure IB...
Topic 2Atomic Structure
IB Chemistry SLCoral Gables Senior High School
Ms. Kiely
Bell-Ringer
Bell-Ringer
Announcement
Practice
Answer
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Practice
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Practice
Test Yourself
Test Yourself
Groups: Columns are referred to as groups. The group number is equivalent to the amount of valence electrons in an atom of that group.
Periods: Rows are referred to as periods. The period number is equivalent to the amount of energy levels that electrons occupy at ground state for the atoms of that element.. Ex/Period 3: The electrons of Na, Mg, Al, Si, P, S, Cl and Ar all occupy the first three energy levels.
Metal atoms:Become positive ions by losing all of their valence electrons; electrons located in their highest occupied energy level
Positive ions are cations
Nonmetal atoms:Become negative ions by gaining enough valence electrons so that their highest occupied energy level is full (has a total of 8 valence electrons)
Negative ions are anions
Cations:The charge for a cation is written as a number followed by a plus sign. The amount of electrons lost is also included:
Ex/ if Na loses its 1 valence electron, then the chemical symbol is:
Na⁺because now Na has 11 protons
and 10 electrons. It is more positive by one proton now.
Anions:The charge for an anion is written as a number followed by a minus sign. The amount of electrons gained is also included:
Ex/ if Cl gains 1 electron, then the chemical symbol is:
Cl⁻because now Cl has 17 protons and 18 electrons. It is more negative by one
electron now.
Bell-Ringer
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Electron Configuration Diagram
1s_
2s_ 2p_ _ _
3s_ 3p_ _ _ 3d_ _ _ _ _
4s_ 4p_ _ _ 4d_ _ _ _ _ 4f_ _ _ _ _ _ _
5s_ 5p_ _ _ 5d_ _ _ _ _ 5f_ _ _ _ _ _ _
We will fill in diagonal arrows to help us follow the Aufbau Principle.
Electron Configuration Rules
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Electron configurations of ions:
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Electron Configuration of neutral Transition Metals
Electron Configuration of neutral Transition Metals
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Transition Metals as Ions
Transition Metals as Ions
Test yourself!
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Answers
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