Phosphorus32 radioactive has than phosphorus35 normal Three

Phosphorus-32 (radioactive) has _______ than phosphorus-35 (normal). Three more neutrons Three more atoms Three fewer neutrons Three more protons Three fewer protons

Solution

Answer is 3 fewer neutrons - isotopes are based on the neutron number. There for here, phosphorus 32 has 15 protons and 17 neutrons but phosphorus 35 has 20 neutrons