query: કેટલાક અણુંઓના કેન્દ્ર ભાગ અસ્થિર હોય છે જેનો અર્થ થાય કે તેઓ થોડાક કે વગર દબાણથી પણ જુદા પડી જઈ જતા હોય છે.
positive: Some atoms have unstable nuclei which means that they tend to break apart with little or no nudging.
negative: Some atoms have not unstable nuclei which means that they tend to break apart with little or no nudging. Some atoms have stable nuclei which means that they tend to break apart with big or no nudging. Some atoms have stable nuclei which means that they tend to break apart with large or no nudging.