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Tenth Grade (Grade 10) Atomic Structure Questions

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Grade 10 Atomic Structure
Which of the following is NOT found in the nucleus?
  1. Proton
  2. Neutron
  3. Electron
Grade 10 Atomic Structure

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How many protons and electrons are in a Cu+2 ion?
  1. 27 protons, 29 electrons
  2. 27 protons, 31 electrons
  3. 29 protons, 27 electrons
  4. 29 protons, 31 electrons
Grade 10 Atomic Structure

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An element has an atomic number of 26 and has isotopes with mass numbers of 56 and 54. Its average atomic mass is 55.845 amu. Based on the average atomic mass, which of the following isotopes is most abundant?
  1. The isotope with a mass number of 54
  2. The isotope with a mass number of 56
  3. Both isotopes have equal abundances
  4. An isotope with a mass number other than 56 or 54
Grade 10 Atomic Structure
Which of the following conclusions is consistent with the Bohr model of the atom?
  1. Electrons exist in fixed circular paths known as orbits.
  2. Electrons are most likely to be located in a space known as an orbital.
  3. Electrons are randomly spaced out around a positive mass.
  4. Electrons are directly adjacent to the nucleus.
Grade 10 Atomic Structure
Which statement is not true?
  1. Neutrons have a positive charge.
  2. Electrons are found in the electron cloud.
  3. Protons and Electrons are subparticles.
  4. Choices a & b are incorrect.
Grade 10 Atomic Structure
If an atom loses a valence electron, what will happen?
  1. The charge of the atom does not change because an electron has no charge.
  2. The atom will lose the same amount of protons to keep the charge neutral.
  3. The atom will become positively charged because it has lost an electron.
  4. The atom will become negatively charged because it has lost an electron.
Grade 10 Atomic Structure

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Which of the following models visualized the atom as being a positive mass with negatively-charged particles spread throughout the mass?
  1. Nuclear Model
  2. Orbital Model
  3. Plum Pudding Model
  4. Bohr Model
Grade 10 Atomic Structure
How does an S2- ion differ from an electrically neutral sulfur atom?
  1. mass number
  2. atomic number
  3. proton number
  4. number of electrons
Grade 10 Atomic Structure
The three particles that make up an atom are
  1. protons, neutrons, and isotopes.
  2. neutrons, isotopes, and electrons.
  3. positives, negatives, and electrons.
  4. protons, neutrons, and electrons.
Grade 10 Atomic Structure
Which combination of particles make up the nucleus of an atom?
  1. neutrons
  2. protons
  3. electrons
  4. zebulons
Grade 10 Atomic Structure

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Which of the following isotopes has the same number of neutrons as phosphorus-31?
  1. 3216S
  2. 2914Si
  3. 3215P.
  4. 2814Si
Grade 10 Atomic Structure

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Which of the following statements best summarizes the modern model of the atom?
  1. Protons travel in circular paths around a charged nucleus.
  2. Negative electrons are found in positive matter.
  3. Matter is composed of identical and indivisible particles.
  4. Electrons are likely to be found in orbitals around the nucleus.
Grade 10 Atomic Structure
Which of the following correctly describes the nature of the atom, according to the wave-mechanical theory?
  1. The atom consists of electrons that move around in circular orbits around the nucleus.
  2. The atom consists of empty space and a positively-charged nucleus.
  3. The atom consists of electrons that are located with the highest degree of probability in a region known as the orbital.
  4. The atom consists of protons, neutrons, and electrons scattered around in the atom in a random fashion.
Grade 10 Atomic Structure
In which shell are the valence electrons of argon found?
  1. first
  2. third
  3. second
  4. fourth
Grade 10 Atomic Structure

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Mg has three different isotopes. Mg-24 has an abundance of 78.70%, Mg-25 has an abundance of 10.13%, and Mg-26 has an abundance of 11.17%. Which setup is correct for calculating the atomic mass of magnesium?
  1. (78.70)(24 u)+(10.13)(25 u)+(11.17)(26 u)
  2. (78.70)(24 u)+(11.17)(25 u)+(10.13)(26 u)
  3. (0.7870)(24 u)+(0.1013)(25 u)+(0.1117)(26 u)
  4. (0.7870)(24 u)+(0.1117)(25 u)+(0.1013)(26 u)
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