Chart Of Common Polyatomic Ions

Virtually the Naming Polyatomic Ions Listing and Worksheet

Use this naming polyatomic ions list and worksheet (answers provided) to quickly acquire important chemical names and formulas. There are 4 exercises to practice, plus complete instructions, in the 5 page bundle.

Click here for complete instructions in video format.

You tin use the packet to quickly review names and formulas for polyatomic ionic compounds. Y'all'll acquire the patterns easily, the names and formulas will get obvious, and you'll save tons of time with chemistry class once you know this organization. Before getting started, you should understand uncomplicated ionic compounds equally shown in the Naming Ionic Compounds Worksheet.

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Polyatomic Ions

Polyatomic ions are charged groups of atoms. An example is ammonium ion, NH₄ ⁺. Information technology has v atoms (one nitrogen and iv hydrogens) that share a charge of +one. The polyatomic ions remain intact, and parentheses may be required when using subscripts. For instance, ammonium chloride is NH_fourCl and ammonium sulfide is (NH_iv)_iiS. Ammonium is the only polyatomic cation. Common anions are shown in Tabular array 1.

There are many polyatomic anions. Many occur in families of names.Commencement by learning the polyatomic ions ending with "-ate" such equally chlorate (ClO₃ ^–), nitrate (NO_iii ^–), sulfate (SO₄ ^ii-), carbonate (CO₃ ^2-), and phosphate (PO₄ ^three-).

The corresponding "-ite" ion name has one less oxygen and the same accuse. For instance, chlorite ion is ClO₂ –. Less commonly used names are the "per__-ate" and "hypo__-ite" forms to betoken unlike numbers of oxygen.

Cardinal in on the chlorate family in Table i to construct names for other ions. For example, sulfite (not in the table) would exist SO_iii ^2-, considering it has the aforementioned accuse and one less oxygen than sulfate (And so₄ ^2- in the table).

Notes:

Sometimes "bi-" indicates H+ has attached. For example, bicarbonate (HCO₃ ^– and carbonate (CO₃ ^2-).
Hydroxide, cyanide, acetate, and chromate are common polyatomics that do non occur in families.

Table one. Polyatomic ions

Know the 5 -ates

Polyatomic ions are NOT in the periodic table. Everything almost ionic bonding all the same applies, except that y'all cannot figure out the charges past looking at the periodic table like for simple ionic compounds.

You need to either memorize, know, or accept the listing of polyatomic ions to figure out the names and formulas. There is simply no manner to figure out the charges and numbers of oxygen atoms using the periodic tabular array.

We suggest you go familiar with "the v -ates:" chlorate (ClOiii –), nitrate (NO3 –), sulfate (SO4 2-), carbonate (CO3 2-), and phosphate (PO4 iii-). Many, many mutual chemicals in labs and chemistry classes are related to these 5.

Do 1.

Complete the table of neutral ionic compounds with the formulas and names for each cation-anion pair.

For example, calcium ion Ca2+ and carbonate COthree 2- combine in a ane:1 ratio as the neutral chemical compound calcium carbonate CaCO3, the major component of limestone formations.

Sometimes parentheses are used around polyatomics. For example Ca2+ and hydroxide OH– combine in a ane:2 ratio equally the neutral compound calcium carbonate Ca(OH)2. The parentheses signal that there are ii hydroxides for each calcium.