Table of Contents
What makes a polyatomic ion stable?
With one or more electrons added or removed, a stable structure results. Well-known examples of such polyatomic ions are the sulfate ion (SO42–), the hydroxide ion (OH–), The only difference is that the number of electrons in the ion does not exactly balance the sum of the nuclear charges.
Are polyatomic ions stable?
Polyatomic ions are generally very unstable and reactive. An common example of an ion is Na+. Sodium has a +1 charge because sodium has eleven electrons. Chlorine naturally has 17 electrons but it would be more stable with 18 electrons (2 in its inner most shell, 8 in its second shell, and 8 in its valence shell).
What are the factors responsible for the stability of ionic compounds?
Stability of ionic solids depends on lattice energy, which is released in the form of heat when two ions are brought together to form a solid. Lattice energy is the sum of all the interactions within the crystal. The properties of ionic crystals reflect the strong interactions that exist between the ions.
How do you determine the stability of an ion?
The stability of ionic compounds depends on how easily one atom of the compound can gain electrons and how easily another atom of the compound can lose electrons….
- Charge on the ions.
- Size of the ions- larger the anion and smaller the cation, more is the stability of the compound.
- Ease.
Which of the following anions is polyatomic?
| Symbols and Names of Some Common Polyatomic Ions and One Molecule | ||
|---|---|---|
| NH4+ | ammonium ion | cyanide ion |
| HSO4- | hydrogen sulfate ion | thiocyanate ion |
| SO32- | sulfite ion | carbonate ion |
| NO3- | nitrate ion | hydrogen carbonate |
Is CH3 polyatomic ion?
However, this group of atoms is most stable when it has either lost of gained an electron and thus existed as a charged ion….Table of Polyatomic Ions.
| Name | Formula |
|---|---|
| acetate acetate | CH3COO− C2H3O2 − |
| carbonate | CO3 2− |
| hydrogen carbonate (aka: bicarbonate) | HCO3 − |
| chromate | CrO4 2− |
Which of the factors determine the polarity of polyatomic molecules?
A polyatomic molecule will have polar bonds if its atoms are not identical. Each oxygen-hydrogen bond is polar, with the oxygen atom bearing the partial negative charge and the hydrogen atom the partial positive charge.
Which does the polyatomic anion fall into atom or molecule?
Chastity Chapin, M.F.A. A polyatomic anion can be a confusing term. You might reason that it falls under the category of atom since you can spot “atom” in “polyatomic.” You might also reason that it’s a molecule since it refers to multiple atoms. Remember, a molecule is the product of multiple atoms.
How do you find the overall charge of a polyatomic ion?
When drawing Lewis dot structures, the overall charge on a polyatomic ion is equal to the sum of the formal charges on each atom in the ion. [What is formal charge?] Lewis structure of hydroxide. The Lewis dot structure for the hydroxide ion.
What is the difference between monatomic and polyatomic ions?
We can think about polyatomic ions by comparing them to monatomic ions. A monatomic ion is an atom that has been ionized by gaining or losing electrons. The ion has a net charge because the total number of electrons is not balanced by the total number of protons in the nucleus.
How can you tell if an ionic compound is stable or unstable?
Two factors to watch out for: opposite charges attract, and dispersal of charge. unstable anions will tend to be at the intial tails of arrows (form bonds). stable anions will tend to be at the final heads of arrows (likely to be leaving groups)
What is the stability of negatively charged molecules?
Certain negatively charged molecules – such as the cyclopentadienyl anion, pictured below – are aromatic, and therefore possess much greater stability than they would have otherwise. 9. “Basicity” Is Just Another Word For “Stability Of The Negative Charge”