1 / 13

Names and Formulas for Ionic Compounds

Names and Formulas for Ionic Compounds. Types of ions. Monatomic ion ion with one atom Mg 2+ magnesium ion Cl - chloride ion Polyatomic ion ion with more than one atom NH 4 + ammonium NO 3 - nitrate. Naming Ca ” t ” ions. Monatomic cation name stays the same

aram
Télécharger la présentation

Names and Formulas for Ionic Compounds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Names and Formulas for Ionic Compounds

  2. Types of ions • Monatomic ion • ion with one atom • Mg2+ magnesium ion • Cl- chloride ion • Polyatomic ion • ion with more than one atom • NH4+ ammonium • NO3- nitrate

  3. Naming Ca”t”ions • Monatomic cation name stays the same • Sodium, Na goes to sodium ion, Na+ • Calcium, Ca goes to calcium ion, Ca2+ • Polyatomic cation - look up in chart • NH4+ammonium

  4. Naming Anions • The name changes in a monatomic anion • The ending for a monatomic anion is ______ide (like a bride changes her last name) • chlorine, Cl goes to chloride ion, Cl- • Fluorine, F goes to fluoride ion, F- • Polyatomic anion look up in chart • OH- hydroxide • SO42- sulfate

  5. Question Time Given the neutral atom, give the charge and name of the monatomic ion that will form. (Look at periodic table group numbers for help.) • Na • Cl • Mg • S • P Na+ sodium cation Cl- chloride anion magnesium cation Mg2+ sulfide anion S2- phosphide anion P3-

  6. Naming ionic compounds • Name the cation first and then the anion second (+ then -) • Example: CsF • Monatomic cations use the element name • Cs+ = cesium ion • Monatomic anions – change the ending to ide • F -=fluoride ion cesium fluoride

  7. Will these form an Ionic Compound? If so what will the formula name be? • Mg Al • Al S • Mg O • Na N • C S No two metals Yes aluminum sulfide Yes magnesium oxide Yes sodium nitride No two non-metals

  8. Formula Unit • NaCl versus Na2Cl2 • Formula Unit—the simplest ratio of ions in an ionic compound • How would you write the formula for Sodium and Nitrogen?

  9. Formula Unit with Polyatomic ions • Sometimes you will need to use more than one polyatomic ion to balance a charge. • If so, you need to put it in parenthesis (like a package) and use a subscript for the multiple number Ex: Mg2+ and NO3- These charges do not balance so we must crisscross them Mg1(NO3)2 (we don’t need the 1) Mg(NO3)2

  10. Transition Metal Ions • Transitions metals will form cations • Some transition metals only have one ionic charge • Silver (Ag+), Cadmium (Cd2+), Zinc (Zn2+) • Some transition metals can take on more than one charge. • Copper (Cu+, Cu2+) • Charge is determined from the number of electrons lost

  11. Naming Transition Metal Ions • If a transition metal has more than one charge, the charge is written as a Roman numeral in parenthesis • Some metals need a middle name • Fe (iron) has more than one charge: 2+ and 3+ • Fe2+ iron(II) • Fe3+ iron(III) • If the transition metal only has one charge, no Roman numeral is needed

  12. Naming Ionic Compounds with Transition Metals Given: Fe2O3 • First find the charges of the ions • Then name the cation followed by the anion • Iorn(III)oxide • Try this one: Fe3P2 • the charge on iron is a 2+ • iron(II) phosphide

  13. Question Time Name the charge on the transition metal: • copper (II) nitrate • gold (I) chromate Name the compound: • FeO • Zn(OH)2 • CoPO4 2+ 1+ iron (II) oxide zinc hydroxide cobalt (III) phosphate

More Related