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Unit 1 – Day 5

Unit 1 – Day 5. Naming Transition Metal and Polyatomic Compounds. Naming Basic Ionics Review. When naming a compound: List the metal first, and the non-metal second. Change the non-metal’s ending to “ ide ” To give a formula from a name: Write symbols for both elements

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Unit 1 – Day 5

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  1. Unit 1 – Day 5 Naming Transition Metal and Polyatomic Compounds

  2. Naming Basic Ionics Review • When naming a compound: • List the metal first, and the non-metal second. • Change the non-metal’s ending to “ide” • To give a formula from a name: • Write symbols for both elements • Write their charges above • Criss-cross the charges down as subscripts • Reduce if necessary.

  3. Examples: • Name us: • BeF2 • ZnCl2 • Give formula: • Sodium nitride • Magnesium sulfide • Aluminum iodide

  4. Transition Metals • These are the metals that do not fall under groups 1 through 8. • Examples: Copper, Iron, Gold, Nickel, Zinc • Charges need to be found on the back of your periodic table. • Some of these metals can have more than one charge, so we indicate it with roman numerals

  5. Roman Numerals • I (one) • II (two) • III (three) • IV (four) • V (five) • VI (six)

  6. Naming with Transition Metals • You will need to learn and recognize the six metals with multiple charges. They are listed on the back of your periodic table. • Au, Pb, Cu, Sn, Hg, Fe • When naming, you will need to determine the charge of the metal in order to name it.

  7. Naming with Transition Metals • Examples: • SnF2 • CuO • PbS2

  8. Giving Formulas with Transition Metals • The criss cross method is used. • The roman numeral gives the charge (NOT the number of atoms). • Examples: • Copper (II) chloride • Mercury (I) nitride • Lead (IV) carbide

  9. Polyatomic Ions • Some ions are made up of more than one type of atom. • Examples: • sulfate (SO4)-2, nitrate (NO3)-1, hydroxide (OH)-1 • They behave exactly like all other ions in bonding.

  10. Naming with polyatomics • With polyatomic ions, they already have their ending (ide or ate) so this will not change. • Ions need to be looked up on the back of the table. • Examples: • NaNO3 • Be(OH)2

  11. Giving Formulas of Polyatomics • Look up the formula and charge of a polyatomic ion. • The charge can be used to criss cross. • If you have multiple ions, you need to use brackets to show this. • Example: Al(ClO3)3 (means 3 chlorate ions)

  12. Examples • Barium sulfate • Ammonium hydroxide • Zinc bromate • Iron (III) phosphate

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