Open QuestionThe atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does it have?2179views
Open QuestionThe center of an atom is a dense region consisting of protons and neutrons called the816views
Open QuestionWhich subatomic particle plays the greatest part in determining the properties of an element?928views
Open QuestionAn uncharged atom has six electrons. the nucleus of this atom must contain _______ protons.1121views