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MCQs

Total Questions : 622 | Page 59 of 63 pages
Question 581. Inert gases have
  1.    1-3 valence electrons
  2.    4-7 valence electrons
  3.    stable valence electrons in outermost shells
  4.    up to 10 valence electrons
 Discuss Question
Answer: Option C. -> stable valence electrons in outermost shells
Answer: (c).stable valence electrons in outermost shells
Question 582. In tritium, number of neutrons is
  1.    3
  2.    2
  3.    1
  4.    0
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 583. Elements and their isotopes have different
  1.    number of protons
  2.    number of electrons
  3.    chemical properties
  4.    mass numbers
 Discuss Question
Answer: Option D. -> mass numbers
Answer: (d).mass numbers
Question 584. The number of times a p⁺ is heavier than an e⁻ is
  1.    18 times
  2.    184 times
  3.    200 times
  4.    1840 times
 Discuss Question
Answer: Option D. -> 1840 times
Answer: (d).1840 times
Question 585. By exposure of electrons beams on atoms and observing their behavior upon the fall of the beam can help to determine
  1.    charge
  2.    weight
  3.    length
  4.    volume
 Discuss Question
Answer: Option A. -> charge
Answer: (a).charge
Question 586. An Electric field deflects the beams of
  1.    protons only
  2.    electrons only
  3.    neutrons
  4.    protons and electrons
 Discuss Question
Answer: Option D. -> protons and electrons
Answer: (d).protons and electrons
Question 587. The major part of an atom is
  1.    electric field
  2.    space
  3.    nucleus
  4.    orbital
 Discuss Question
Answer: Option B. -> space
Answer: (b).space
Question 588. The atomic number of Barium (Ba) is
  1.    12
  2.    38
  3.    20
  4.    56
 Discuss Question
Answer: Option D. -> 56
Answer: (d).56
Question 589. The tiny area in the center of atom is concentrated with mass and is known as
  1.    proton
  2.    neutron
  3.    electron
  4.    nucleus
 Discuss Question
Answer: Option D. -> nucleus
Answer: (d).nucleus
Question 590. The atomic number of Strontium (Sr) is
  1.    12
  2.    38
  3.    20
  4.    56
 Discuss Question
Answer: Option B. -> 38
Answer: (b).38

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