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You use the criss cross method to swith the charge of the element with the charge of the whole ion

If the charge of the element is more than one then put the ion in parenthesis and then put the charge outside

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Q: How are formulas written for ionic compounds with polyatomic compounds given their names?
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Related questions

Why does crude oil have no chemical name or symbol?

Symbols are given to elements. Formulas describe compounds. Petroleum contains up to 3,000 different compounds, many in very small quantities. Further, every field has a unique mixture of compounds, so no one formula would work. See link.


Is a metallic bond similar to polyatomic?

Yes, metallic bonds are polyatomic, in the sense that all the atoms in a given piece of metal share a bond, it's not just a bond between adjacent atoms, as in other types of bonding such as ionic or covalent.


When can a compound be treated as an element when balancing chemical equations?

You can treat a polyatomic ion as an element when balancing equations. The following example involves the polyatomic ion NO3-. Notice that the entire polyatomic ion is placed in parentheses and given its own subscript. 2Al(s) + 3Mg(NO3)2(aq) --> 2Al(NO3)3(aq) + 3Mg(s)


What is the name given to the elements or compounds on the right side of the equation?

The elements and compounds to the right of the equations are called products.


What is another name given to the mixture of liquid and gas?

compounds


Why do mixtures not have chemical formulas?

In general, it's impossible to know ahead of time how much of compound A and how much of compound B might be in a particular mixture of A and B. The mixture doesn't have any given chemical formula, because sometimes it might be mostly A with some B and sometimes it might be almost all B with only a tiny bit of A. There's one exception to this: Sometimes you'll see formulas given for mixtures where the proportions are known, e.g. a particular mineral might have a "formula" of Ca(0.8)Mg(0.2)CO(3) where the numbers in parentheses represent subscripts.


Can formulas be copyrighted?

Yes, formulas are given to us to help solve problems. It is legal to use them and copyright them


What is the name given to compounds that only contain hydrogen and carbon?

hydrocarbon


What name is given to compounds like copper chloride and sodium chloride?

Salts


What is the name given to a group of atoms that are covalently bonded together?

Covalent compounds


Are ionic compounds allways neutral?

No, they should always not be. As an example, NaOH can be given.


What is the name given to the unit that make up covalently bonded compounds?

molecules