Respuesta :
A monatomic ion is an ion that is made of more than one atom and is from an element like calcium consisting of Ca²+ and a polyatomic ion that is Co²/³.
- Many elements such as hydrogen, lithium, sodium, potassium, and magnesium consist of positively charged ions.
- Other like fluoride, chlorine and iodine, and hydride consists of negatively charged ions.
Thus the correct option is Na and K that is sodium and potassium.
Learn more about the basis of electronegativity.
brainly.com/question/2247986.