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Tenth Grade (Grade 10) Atomic Structure Questions

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Grade 10 Atomic Structure
Which statement describes isotopes?
  1. Isotopes of the same element have different electron arrangements.
  2. Isotopes of the same element have different nuclear charges.
  3. Isotopes of the same element have nuclei with masses that are the same.
  4. Isotopes of the same element have the same number of protons
Grade 10 Atomic Structure
If you add an additional neutron to an atom, what do you create?
  1. a new element
  2. an isotope
  3. a reaction
  4. an ion
Grade 10 Atomic Structure

This question is a part of a group with common instructions. View group »

In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?
  1. The nucleus is negatively charged.
  2. The atom is a dense solid and is indivisible.
  3. The mass is conserved when atoms react chemically.
  4. The nucleus is very small and the atom is mostly empty space.
Grade 10 Atomic Structure
Which is the electron configuration of a neutral atom with a total of six valence electrons?
  1. [math]1s^2 2s^2 2p^2[/math]
  2. [math]1s^2 2s^2 2p^4[/math]
  3. [math]1s^2 2s^2 2p^6[/math]
  4. [math]1s^2 2s^2 2p^6 3s^2 3p^6[/math]
Grade 10 Atomic Structure

This question is a part of a group with common instructions. View group »

A neutral atom contains 12 neutrons and 11 electrons. What is the number of protons in this atom?
  1. 12
  2. 23
  3. 1
  4. 11
Grade 10 Atomic Structure
How many neutrons are present in the atom shown below?
  1. 21
  2. 24
  3. 45
  4. 66
Grade 10 Atomic Structure
Which of the following atoms has the fewest electrons?
  1. [math]{::}_53^127I[/math]
  2. [math]{::}_52^128Te[/math]
  3. [math]{::}_51^123Sb[/math]
  4. [math]{::}_50^121Sn[/math]
Grade 10 Atomic Structure
X and Y are isotopes of the same element. Which statement is correct?
  1. X and Y have atoms with different numbers of electron shells.
  2. X and Y have atoms with the same nucleon number.
  3. X and Y have atoms with the same number of outer shell electrons
  4. X and Y have different chemical properties.
Grade 10 Atomic Structure
Which element does not form a stable ion with the same electronic structure as argon?
  1. aluminium
  2. chlorine
  3. phosphorus
  4. potassium
Grade 10 Atomic Structure
An atom consists of what key, primary components?
  1. ions, protons, electrons
  2. protons, electrons, molecules
  3. protons, electrons, neutrons
  4. elements, neutron protons
Grade 10 Atomic Structure
Which of the following pairs shows isotopes of the same element?
  1. [math]""_6 ^12C and ""_6 ^12C [/math]
  2. [math]""_6 ^14C and ""_7 ^14N [/math]
  3. [math]""_6 ^14C and ""_6 ^12C [/math]
  4. [math]""_6 ^14C and ""_6 ^14C^-4 [/math]
Grade 10 Atomic Structure
An atom's valence electrons are those in its                       .
  1. outermost energy level
  2. lowest energy level
  3. electron clouds
  4. inner energy level
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