Which polyatomic ion forms a neutrak compound when combined with a group 1A monatomic ion in a 1 1 ratio?

Answer 1

Since Group 1A monatomic ions have a charge of 1+, only a polyatomic ion with a charge of 1- can combine to form a compound in which the monatomic ions and polyatomic ions are present in a 1 to 1 ratio. The following polyatomic ions with a charge of 1- can form a neutral compound when combined with a group of 1A monatomic ion in a 1 to 1 ratio.acetate - C2H3O2-

bicarbonate (or hydrogen carbonate) - HCO3-

bisulfate (or hydrogen sulfate) - HSO4-

chlorate - ClO3-

chlorite - ClO2-

cyanate - OCN-

cyanide - CN-

dihydrogen phosphate - H2PO4-

hydroxide - OH-

nitrate - NO3-

nitrite - NO2-

perchlorate - ClO4-

permanganate - MnO4-

thiocyanate - SCN- Source: http://chemistry.about.com/od/chartstables/tp/common-polyatomic-ions.htm

Answer 2

The hydroxide ion (OH-) forms a neutral compound when combined with a group 1A monatomic ion (e.g., Na+, K+) in a 1:1 ratio, as they combine to form compounds such as sodium hydroxide (NaOH) or potassium hydroxide (KOH).