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<strong>Oxidation</strong> <strong>Numbers</strong> <strong>Worksheet</strong><strong>Name</strong>: _________________________Chemistry2 points Date: _____________ Hour: _______1) What is an oxidation number? ________________________________________________________________________________________________________________________2) What is another word that means oxidation number? ______________________________3) What is a valence electron? __________________________________________________________________________________________________________________________4) What is the maximum number of valence electrons an atom can have? ________________5) What is the most stable number of valence electrons? _____________________________6) What is the name of the chemical family of atoms that have the most stable number ofvalence electrons? _________________________________________________________7) What is another name for the d-block? _________________________________________8) (a) Is the d-block composed of metals, nonmetals, or metalloids? ____________________(b) Explain how you know. __________________________________________________________________________________________________________________________9) Many d-block, f-block, and p-block metals can have more than one oxidation number. Theymust first lose their ________________________ electrons, then they can lose their otherelectrons one-by-one.2+ 3+ 4+ 5+10) Vanadium can form four oxidation numbers, V , V , V , and V .(a)Write the noble gas electron configuration shorthand for vanadium:__________________________________________________________________(b)(c)(d)(e)How many valence electrons does vanadium have? _________________________A positive charge means the atom ______________________ electrons.2+Which electrons would vanadium lose to form V ? _________________________5+Which electrons would vanadium lose to form V ? _________________________
(f)Which of the four oxidation numbers would you predict to be the most stable?Explain your choice. ___________________________________________________________________________________________________________________6+ 2+11) Tungsten can form two oxidation numbers, W and W .(a)Write the noble gas electron configuration shorthand for tungsten:__________________________________________________________________(b)(c)(d)(e)(f)How many valence electrons does tungsten have? __________________________A positive charge means the atom ______________________ electrons.2+Which electrons would vanadium lose to form W ? ________________________6+Which electrons would vanadium lose to form W ? _________________________Which of the two oxidation numbers would you predict to be the most stable?Explain your choice. ___________________________________________________________________________________________________________________12) Indium can form two oxidation numbers.(a)Write the noble gas electron configuration shorthand for indium:__________________________________________________________________(b)(c)(d)(e)How many valence electrons does indium have? ___________________________A positive charge means the atom ______________________ electrons.What two oxidation numbers would you predict for indium? _________________Show how indium would form these two oxidation numbers:(f)Which of the two oxidation numbers would be more stable? Explain your choice.
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