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Electrons and Ions (p. 37) (Date)

Electrons and Ions (p. 37) (Date). Target: I know what an ion is and how to find the number of electrons. Number of electrons is usually the same as the number of protons, unless the atom has a charge Charged atoms are called ions

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Electrons and Ions (p. 37) (Date)

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  1. Electrons and Ions (p. 37)(Date) Target: I know what an ion is and how to find the number of electrons.

  2. Number of electrons is usually the same as the number of protons, unless the atom has a charge • Charged atoms are called ions • Atoms charge negative by gaining electrons, or they charge positive by losing electrons

  3. How many…?(p. 36, ½ page)

  4. Electron Arrangement in an Atom(74, half page) • (Copy Figure 2 on p. 227 with txt a, b, c)

  5. Electrons are found in electron shells or energy levels, according to the period number • Atoms can only gain or lose electrons from the outermost shell • Electrons in the outermost shell are called valence electrons

  6. Summary( p. 75): • (Write a 3 sentence summary, using the words “atomic number”, “electrons”, “ion”)

  7. Practice: List the number of protons, neutrons and electrons (p. 56) • Fluorine- 19, atomic number 9: P __, N__, E__ • Lithium-7, atomic number 3 : P __, N__, E__ Use your periodic table: • Helium-4 : P __, N__, E__ • Calcium-41 : P __, N__, E__

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