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No, Methane (CH4) is not a polyatomic ion. It doesn't have a charge, therefore it can't be an ion. It's considered a hydrocarbon.
This just means it has a charge of 1+. The Boron ion can only have a charge of 1+.
Cation = negative ion
80 is an integer. If you are asking for the Celsius equivalent of 80°F, then the answer is 26.555...°C
O2- is the symbol for the oxide ion, which is an oxygen atom that has gained two electrons. The oxide ion has a charge of -2.
If you think to fluorine the ion is F- (charge 1-).
The sodium ion (Na+) is a cation (positive charge) and the fluoride ion (F-) is an anion (negative charge).
Fluoride is a monovalent anion ===> F-
NO !!!! Fluorine form an ANION , that is an ion eith negative charge. 'F^(-) '.
It is a single negative charge, so the fluoride ion is denoted F-. The fluorine atom gains one electron to incur a single negative charge of -1.
F^-1 and Br^-1
Fluorine will gain one electron to form F- (or fluoride) ion. Fluoride ion has a charge of -1.
An ion does have a charge. That is what makes it an ion.
Remember.. I f there are more electrons than protons in an ion the charge will be negative. Here there is a -4 charge because the electrons are higher than the protons, if it were the opposite the charge would be +4.
Well, it would be sodium-83, if it were even remotely possible that such a thing could possibly exist for even an instant. If 83 is a typo and you meant "23", then the answer is the sodium-23 ion.
This is the electrical charge of the ion.
Fluorine element is 'F' The fluorine molecule is 'F2'. ( F-F) The fluoride ion is 'F^-' . (NB The fluorine ion is named as 'Fluoride'.