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Is there a way to figure out the charges of polyatomic ions without memorizing them?
These groups of atoms are called polyatomic ions. While there are some ways of figuring out the charges on each ion, as well as tricks to remembering others, there are no solid rules on how they are named and what charges they carry. The only way to be sure of the charges and names of these ions is to memorize them.
What determines the charge of a polyatomic ion?
In a polyatomic ion, the group of covalently bonded atoms carries a net charge because the total number of electrons in the molecule is not equal to the total number of protons in the molecule.
How do you identify polyatomic ions?
All the elements on the periodic table start with a capital letter and only some of them have a second letter that is lower case. So if you see two capital letters together in a ion then you will know that it is a polyatomic.
How do you identify a polyatomic ion?
So if you see two capital letters together in a ion then you will know that it is a polyatomic. Just like capitals are used to shout in texts, polyatomic ions shout at you to recognize they are there.
What polyatomic ions have a 2 charge?
Common Polyatomic Ions
| -2 CHARGE | |
| ion | name |
|---|---|
| HPO32- | hydrogen phosphite |
| HPO42- | hydrogen phosphate |
| CO32- | carbonate |
What is the formula for the polyatomic ion?
Polyatomic ion. An ammonium ion is made up of one nitrogen atom and four hydrogen atoms: it has a charge of +1, and its chemical formula is NH+ 4 . Polyatomic ions are often useful in the context of acid-base chemistry or in the formation of salts. A polyatomic ion can often be considered as the conjugate acid/base of a neutral molecule.
What is the formula for polyatomic ions?
An example of a polyatomic ion is the hydroxide ion; consisting of one oxygen atom and one hydrogen atom, hydroxide has a charge of −1. Its chemical formula is OH−. An ammonium ion is made up of one nitrogen atom and four hydrogen atoms: it has a charge of +1, and its chemical formula is NH+.
What is a polyatomic ionic compound?
A polyatomic ion has two or more covalently bonded atoms that act as a single ion. The polyatomic ion forms ionic bonds with other ions and acts externally as a unit, just like monatomic ions. The resulting polyatomic ionic compounds can take part in the different types of chemical reactions, dissolving and dissociating in water.