Dichromate has 7 oxygen atoms (Cr2O7-2)
Phosphate is a polyatomic ion, not an element and so it does not have an atomic number. It is composed of oxygen and phosphorus which have the atomic numbers 8 and 15 respectively.
No, ammonium is not an oxyanion. It is a polyatomic cation composed of one nitrogen atom and four hydrogen atoms, with a net positive charge. Oxyanions are negatively charged ions that contain oxygen.
Yes. Mg2+ is a monatomic ion, but SO42- is a polyatomic ion composed of two elements, sulfur and oxygen.
The -ite or -ate ending in a polyatomic ion is simply an indication of the amount of oxygen atoms present. The -are ending is used in the base form. If the polyatomic ion has one less oxygen atom than the -ate form, the -ite form applies.
Oxyacids consist of nonmetal elements combined with oxygen and hydrogen. Common examples include sulfuric acid (H2SO4), nitric acid (HNO3), and phosphoric acid (H3PO4). These compounds are named based on the nonmetal element present in the compound.
The "big wheel" in molybedenum blue is quite big with 532 oxygen atoms in the structure. If you include solid state compounds with network anions such as silicates then the number would be much much bigger, only restricted by the size of the single crystal you could make.
Sulfate is an example of a polyatomic ion that contains oxygen. It has the chemical formula SO4^2-.
Sulfuric acid (H2SO4) includes the polyatomic ion sulfate (SO4^2-), which contains oxygen.
One example of a compound that includes a polyatomic ion containing oxygen is sodium nitrate (NaNO3). This compound contains the nitrate ion (NO3-) which is a polyatomic ion that includes oxygen.
To determine which compound contains the greatest number of oxygen atoms, one would need to compare specific chemical formulas. For example, compounds like ozone (O₃) and hydrogen peroxide (H₂O₂) both contain oxygen, but hydrogen peroxide has more oxygen atoms per molecule. Generally, compounds with larger molecular formulas or those with multiple functional groups containing oxygen, such as carboxylic acids or polyatomic ions, tend to have a higher number of oxygen atoms.
I hope I understand you question correctly. I think the answer that you are looking for is a polyatomic ion.
Phosphate is a polyatomic ion, not an element and so it does not have an atomic number. It is composed of oxygen and phosphorus which have the atomic numbers 8 and 15 respectively.
Examples of compounds include sulfate (SO4^2-), nitrate (NO3^-), phosphate (PO4^3-), carbonate (CO3^2-), and chromate (CrO4^2-), which all contain oxygen in their polyatomic ions.
No, ammonium is not an oxyanion. It is a polyatomic cation composed of one nitrogen atom and four hydrogen atoms, with a net positive charge. Oxyanions are negatively charged ions that contain oxygen.
For polyatomic anions containing oxygen, or oxyions, the most common for of the ion has a name ending in -ate.
HNO3 Looks like three oxygen atoms as part of the polyatomic ion nitrate, NO3 -.
The term for a polyatomic anion containing one or more elements combined with oxygen is called an oxoanion. Oxoanions are formed when an element is bonded with one or more oxygen atoms to create a charged particle with an overall negative charge.