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20 maj 2018 · Ionic compounds are named by stating the cation first, followed by the anion. Positive and negative charges must balance. Some anions have multiple forms and are named accordingly with the use of roman numerals in parentheses. Ternary compounds are composed of three or more elements.
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You can see that 'ate' has one more oxygen, and that I have listed them in charge order. Sometimes looking at the trends in oxygen and charge will help you memorize. I have had to remember them by writing them down several times and now I am comfortable. Here is another example: Hypochlorite is $\ce{ClO^-}$ So, chlorite should be? $\ce{ClO2 ...
The procedure for naming such compounds is outlined in Figure \ (\PageIndex {1}\) and uses the following steps: Figure \ (\PageIndex {1}\) Naming an Ionic Compound. Place the ions in their proper order: cation and then anion. Name the cation. Metals that form only one cation.
There are two ways to make this distinction. In the simpler, more modern approach, called the Stock system, an ion’s positive charge is indicated by a roman numeral in parentheses after the element name, followed by the word ion. Thus, Fe 2+ is called the iron (II) ion, while Fe 3+ is called the iron (III) ion.
25 wrz 2022 · Polyatomic ions have characteristic formulas, names, and charges that should be memorized. For example, NO 3 − is the nitrate ion; it has one nitrogen atom and three oxygen atoms and an overall 1− charge.
By the end of this section, you will be able to: Explain the formation of cations, anions, and ionic compounds. Predict the charge of common metallic and nonmetallic elements, and write their electron configurations. As you have learned, ions are atoms or molecules bearing an electrical charge.
Because some atoms will lose electrons and some atoms will gain electrons, there is no overall change in the number of electrons, but with the transfer of electrons the individual atoms acquire a nonzero electric charge. Those that lose electrons become positively charged, and those that gain electrons become negatively charged.
