15. Five marks exercise problems XIII

An atom can contains protons which have a positive charge \((+)\) and electrons which have a negative charge. \((-)\). When an electron and a proton pair up, they become neutral \((0)\) and cancel the charge out. Now, determine the net charge:

 

(i) \(5\) electrons and \(3\) protons \(=\)  electronprotonneutral

  

(ii) \(6\) protons and \(6\) electrons \(=\) protonelectronneutral

  

(iii) \(9\) protons and \(12\) electrons \(=\)  protonelectronneutral

  

(iv) \(4\) protons and \(8\) electrons \(=\)  electronprotonneutral

  

(v) \(7\) protons and \(6\) electrons \(=\)  neutralelectronproton