Open QuestionHow many protons, neutrons, and electrons are there in a neutral atom of 131I (iodine-131)?565views
Open QuestionHow many protons, neutrons, and electrons are there in a neutral atom of 30P (phosphorus-30)?446views
Open QuestionAn isotope of yttrium has 39 protons and 59 neutrons. What is the mass number of that isotope?1173views
Open QuestionThe superscript preceding each hydrogen atomic symbol (H) represents which of the following?455views