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question_answer1) When alpha particles are sent through a thin metal foil, most of them go straight through the foil. This is because:
question_answer2) What is the approximate thickness of the golden foil used in a-rays scattering experiment?
question_answer3) The e/m ratio is not constant for
question_answer4) What is the approximate thickness of the golden foil used in a-rays scattering experiment?
question_answer5) Which of the following is true regarding the size of the orbits?
question_answer6) An atom has net charge of -1. It has 18 electrons and 20 neutrons. Its mass number is
question_answer7) The species having same number of protons are called:
question_answer8) The total number of protons present in all the elements up to Zn in the periodic table is
question_answer9) Identify the element which has three isotopes with the neutrons, 6, 7, 8 respectively.
question_answer10) Mass numbers of atoms of an element are 1, 2, 3 respectively. Identify the element.
question_answer11) Which of the following statements is not correct?
question_answer12) \[N{{a}^{+}}\] ion is isoelectronic with
question_answer13) Which pair is isoelectronic?
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