Nitrite ion
Nitrite is a polyatomic ion with an overall charge of -1. The formula for nitrite is NO2-.
The formula for the ionic compound formed between magnesium and chlorine is MgCl2. Magnesium, with a 2+ charge, forms an ion while chlorine, with a 1- charge, forms one ion, resulting in a 1:2 ratio in the compound.
The chemical formula of ammonium is (NH4)+.
The formula for the ionic compound formed between chloride and Al3+ would be AlCl3 (aluminum chloride). Aluminum has a 3+ charge, and chloride has a 1- charge, so it takes three chloride ions to balance the charge of one aluminum ion in the compound.
The formula for the ionic compound formed between S^2- and Pb^4+ is PbS2, where lead (Pb) has a 4+ charge and sulfur (S) has a 2- charge. This results in the compound lead(IV) sulfide.
The formula for the ionic compound formed between barium and nitrate is Ba(NO3)2. Barium is a group 2 metal with a 2+ charge, and nitrate is a polyatomic ion with a 1- charge. The charges balance out in the compound.
The formula for one formula unit of the compound between NO2 and Be will be Be(NO2)2. Beryllium forms a +2 cation and nitrite (NO2-) is a polyatomic ion with a -1 charge, so two nitrite ions are needed to balance the charge of one beryllium ion in the compound.
The charge of the polyatomic ion is occasionally included in the chemical formula for a compound containing it. This charge is never used in a binary ionic compound because binary compounds involve only two elements with differing charges, while polyatomic ions already contain multiple elements and an overall charge.
The Sulfate, SO4
Nitrite is a polyatomic ion with an overall charge of -1. The formula for nitrite is NO2-.
The compound francium permanganate has the chemical formula FrMnO4. Hope that helped!
NO3 -
An ionic compound with polyatomic ions is formed through the attraction between positively charged metal ions and negatively charged polyatomic ions. Polyatomic ions are covalently bonded groups of atoms that have an overall charge, making them act as a single charged unit in the formation of ionic compounds.
Polyatomic ions are named with their specific names, regardless of their overall charge. When naming an ionic compound with a polyatomic ion, the name of the cation is written first followed by the name of the anion (polyatomic ion).
A polyatomic ion is a charged species composed of two or more atoms held together by covalent bonds, giving it a net charge. In contrast, a covalent compound is a molecule formed when two or more nonmetal atoms share electrons to form covalent bonds, with no overall charge.
No, oxide is just an oxygen ion. The formula is just O(-2 charge), hence not a polyatomic ion. Hydoxide on the other hand is a polyatomic ion, formula being OH(-1 charge)
The formula for the compound formed between barium and nitrogen is Ba3N2, which is called barium nitride. Barium has a 2+ charge and nitrogen has a 3- charge, so the formula is derived from their charges balancing out to form a neutral compound.