![]() Solve the crossword with the help of clues:Ħ. Which particles determine the mass of an atom? Answer Which isotope of hydrogen is called protium? AnswerĨ. How many electrons are present in it? Answerħ. Hydrogen exists in three isotopic forms, \(_\)K. (iv) Was in agreement with Thomson’s model. (ii) Established that the a-particles are four times as heavy as a hydrogen atom. (i) Considered the nucleus as positively charged. Which of the following statements about Rutherford’s model of atom are correct? AnswerĪnswer: (a) An atom has equal number of electrons and protons. (d) An atom has equal number of electrons, protons and neutrons. (c) An atom has equal number of protons and neutrons. (b) An atom has equal number of electrons and neutrons. (a) An atom has equal number of electrons and protons. Which of the following statement is always correct? Identify the Mg 2 ion from the figure where, n and p represent the number of neutrons and protons respectively.Īn atom with 3 protons and 4 neutrons will have a valency of What is the number of electrons in the ion? Mass number of the atom is 27 and the number of neutrons is 14. ![]() The ion of an element has 3 positive charges. ![]() Arrange the following atomic models in the order of their chronological order (iv) Atomic number = number of protons = number of electronsĪtomic models have been improved over the years. (iii) Atomic mass = number of protons = number of neutrons (ii) Mass number = number of protons number of neutrons (i) Atomic number = number of protons number of electrons Which of the following are true for an element? Which of the following is the correct representation of the element? The number of electrons in an element X is 15 and the number of neutrons is 16. Rutherford’s ‘alpha (α) particles scattering experiment’ resulted in the discovery of
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