Ion Formation1

• Proton p + +1• Electron e- -1• Neutron n 0 0 • • Neutrons are not contributors to charge

Exception: nuclear decay

• Neutral atom has same number of p+ and e- 2

If electrons and protons do not match, what will be a property of the atom? How does this occur?

• Lithium z=3 has how many valence electrons? • What of Beryllium?• Boron?• Carbon?• Nitrogen?• Oxygen?• Fluorine?• Helium? 3

•Lithium will lose the ONE valence electron to another atom due to its electronegativity.•Will have 3 protons, 2 electrons and total charge will be ?•+1 or written as Li+

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WHY?

•Octet Rule?

• Eight electrons in outer most levels either fill or empty levels.• Easier in nature to lose one in lithium

than to find 7 more.•Atoms see the most stable outer

level5

•ANION•CATION•Give examples of each.

•What electrons are lost is charge difference in the +•What electrons are gained is charge

difference in the -6

•Ion charts on wires•You have one or more on history assignment•Interpret ions and with what other ions they may exchange electrons.

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