Question 11 MarkUranium-235 is used in the production of electricity.AnswerTrue.View full question & answer→
Question 21 MarkThe radioactive isotope Sodium-24 is used in the medical treatment of cancer.AnswerFalse. (The radioactive isotope Sodium-24 is used for detection of cracks in the underground pipes.)View full question & answer→
Question 31 MarkThe capacity of the second orbit is 18 electrons.AnswerFalse. (The capacity of the second orbit is 8 electrons.)View full question & answer→
Question 41 MarkElectrons have different energies according to their orbits.AnswerTrue.View full question & answer→
Question 51 MarkThe nth orbit contains at the most $2n^2$ electrons.AnswerTrue.View full question & answer→
Question 61 MarkRutherford discovered the neutron.AnswerFalse. (Chadwick discovered the neutron.)View full question & answer→
Question 71 MarkElectrons moving in different orbits possess the same amount of energy.AnswerFalse. (Electrons moving in different orbits possess different amounts of energy.View full question & answer→
Question 81 MarkAtoms of all elements, except normal hydrogen contain neutrons.AnswerTrue.View full question & answer→
Question 111 MarkThe maximum capacity of the N shell is 18 electrons.AnswerFalse. (The maximum capacity of the N shell is 32 electrons.)View full question & answer→
Question 121 MarkThe chemical properties of isotopes are different.AnswerFalse. (The chemical properties of isotopes are the same.)View full question & answer→
Question 131 MarkAtomic masses are measured in a unit called the dalton (u).AnswerTrue.View full question & answer→
Question 141 MarkThe number of electrons in a given orbit is given by the formula nAnswerFalse. (The number of electrons in a given orbit is given by the formula 2n2)View full question & answer→
Question 151 MarkIn India, total 22 nuclear reactors in eight places are functioning.AnswerTrue.View full question & answer→
Question 161 MarkMatter is composed of molecules and molecules are made of atoms.AnswerTrue.View full question & answer→
Question 171 MarkIsotopes have same atomic number but different atomic mass number.AnswerTrue.View full question & answer→
Question 181 MarkThe electron in the K shell has maximum energy.AnswerFalse. (The electrons in the K shell has minimum energy.)View full question & answer→
Question 191 MarkThe electron has the same mass as that of the proton.AnswerFalse. (The mass of the electron is much less than that of the proton.)View full question & answer→
Question 201 MarkThe mass of an atom is distributed evenly within it.AnswerFalse. (The mass of atom is not distributed evenly, practically all the mass is concentrated in the nucleus.)View full question & answer→