Protons

Protons What are the atomic number and mass number if the number of electron in an element oxygen is 8 and the number of neutrons is 9?
What are the atomic number and mass number if the number of electron in an element oxygen is 8 and the number of neutrons is 9?
What is the atomic mass of an atom with 8 protons 8 neutrons and 8 electrons?What is the mass number and atomic number of an element?How do you find ...