1.

Read the following and answer any four questions from 17 (i) to 17 (v)Isotopes are the atoms of the same element with same atomic number but different mass number. Isotopes of same element have same chemical properties due to same number of electrons. Atomic number of an atom is the number of electrons / protons in it and mass number is the sum of protons and neutrons1x 4 17 (i) Hydrogen has 3 isotopes H, D and T. Number of electrons and neutrons in T will be (A)3,1 (B) 1,2 (C) 1,0 (D)2,1 17 (ii) Isotope of Iodine is used to treat (A)Leg pain (B) Cold and cough (C) Goitre (D)Cancer 17 (iii) H and D isotopes of hydrogen form H2O and D2O with oxygen. Which of the following you think right for the above observation. (A)H and D have same number of protons (B) H and D have same no. Of neutrons (C) A and D have same no. Of electrons (D)H and D have same mass number. 17 (iv) Two isotopes of Uranium have 92 electrons each and have 144, 148 neutrons respectively. Mass numbers of these two isotopes will be respectively (A)237 ,236 (B) 236 ,237 (C) 236 ,238 (D)238 ,236 17 (v) Isotopes of same element have (A)Same no. of neutrons (B) Same physical properties (C) Different chemical properties (D)Different no. Of neutrons.​

Answer»

ANSWER:

B) same PHYSICAL PROPERTIES



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