The Structure of Atom Worksheet-1
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Carbon-14 is used for radiocarbon dating, a method used to determine the age of old rocks and monuments. Carbon-12 and Carbon-14 are
(a) Isotones (b) Isobars (c) Isotopes (d) Isohytes
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The alpha particles that are obtained because of radioactive disintegration of Uranium is basically an atom of
(a) Argon (b) Helium (c) Xenon (d) Radon
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The two isotopes of Chlorine are Cl-35 and Cl-37. They have the similar number of protons. But they differ from each other by the number of
(a) Electrons (b) Protons (c) Neutrons (d) Nucleus
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1 Mole is considered to be 1/12th the mass of an atom of an isotope of carbon. The isotope is
(a) C-12 (b) C-13 (c) C-14 (d) C-15
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Which of the following has more electrons than neutrons
(a) Na+ (b) Mg+2 (c) O2– (d) Al+3
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The fundamental particles constitute the world around us. The particle that is not fundamental among the following is
(a) Neutron (b) Electron (c) Proton (d) Positron
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The Dalton’s Atomic theory was the preliminary study about the structure of the atom. The main defect in the Dalton’s atomic theory is about
(a) Similarity of the atom of the same element
(b) Differences in atoms of different elements
(c) Indivisibility of the atom
(d) That atoms combine in small whole numbers
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If an element has the same mass number and the same atomic number. The element is
(a) Inert Gas (b) Hydrogen
(c) Alpha Particle (d) Helium
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The fundamental particles i.e. electrons, protons and neutrons are present in all the atoms with the exception of
(a) Helium (b) Nitrogen (c) Hydrogen (d) Oxygen
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If the mass of the proton is 1amu. The weight of the electron is supposed to be
(a) 1/2000 amu (b) 1/1950 amu
(c) 1/500 amu (d) 1/1840 amu
Answer Key:
(1)-(c); (2)-(b); (3)-(c); (4)-(a); (5)-(c); (6)-(d); (7)-(c); (8)-(b); (9)-(c); (10)-(d)
