Which statement is true about a polyatomic ion?

it forms metallic bonds with other ions.

it forms covalent bonds with other ions.

it is made of atoms that are covalently bonded together.

it has a charge that is distributed over part of the entire unit.

The correct option for above statement is

It is made of atoms that are covalently bonded together.

Explanation:

A substance particle, conjointly referred to as a molecular particle, may be a charged chemical species (ion) composed of 2 or a lot of atoms covalently secured or of a metal complicated that may be thought-about to be acting as one unit. The word poly- suggests that "many," in Greek, however even ions of 2 atoms are ordinarily noted as substance.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e