If an atom has 8 neutrons and a mass number of 15, how many protons does it have?

How many electrons are there in an atom with 7 protons and a net charge of -3?

What is the atomic number of an atom with 14 protons?

If an atom has 9 neutrons and a mass number of 25, how many protons does it have?

How many electrons are there in an atom with 14 protons and a net charge of 1+?

What is the mass number of an atom with 7 protons and 9 neutrons?

What is the net charge of an atom with 5 protons and 4 electrons?