What determines electrical charge of polyatomic ions

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)

What is the percentage of hydrogen in nitrogen trihydride

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table