{"format":"brainjoy-quiz","version":1,"title":"Atomic structure: five-question sample","subject":"Chemistry","grade":"Secondary practice","questions":[{"type":"mcq","text":"Which subatomic particle has a positive electric charge?","options":["Proton","Neutron","Electron"],"correct":0},{"type":"mcq","text":"An atom has atomic number 6. How many protons does it contain?","options":["6","12","3","0"],"correct":0},{"type":"tf","text":"Isotopes of an element have the same number of protons but different numbers of neutrons.","correct":true},{"type":"mcq","text":"A neutral atom contains 8 protons. How many electrons does it contain?","options":["8","16","0","4"],"correct":0},{"type":"short","text":"What is the name of the negatively charged particle in an atom?","answer":"electron"}]}