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Tenth Grade (Grade 10) Atomic Structure Questions

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Grade 10 Atomic Structure

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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

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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
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

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Grade 10 Atomic Structure

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

Thallium has two isotopes, thallium-203 and thallium- 205. Thallium's atomic number is 81, and its atomic mass is 204.38 amu. Which statement about the thallium isotopes is true?
  1. There is more thallium-203 in nature.
  2. Atoms of both isotopes have 81 protons.
  3. Thallium-205 atoms have fewer neutrons.
  4. The most common atom of thallium has a mass of 204.38 amu.
Grade 10 Atomic Structure
Aluminum atoms tend to react to form                  ions.
  1. [math]3^+[/math]
  2. [math]1^+[/math]
  3. [math]5^-[/math]
  4. [math]3^-[/math]
Grade 10 Atomic Structure
Group 17 elements, the halogens, are the most reactive of the nonmetals because they
  1. require only one electron to fill their outer energy level.
  2. have the highest ionization energies.
  3. have the largest atomic radii.
  4. are the farthest to the right in the periodic table.
Grade 10 Atomic Structure
Grade 10 Atomic Structure
The chemical properties of an atom and the types of bonds it may make are primarily determined by the number of
  1. neutrons it has in its nucleus.
  2. protons it has in its nucleus.
  3. energy levels it has.
  4. electrons it has in its outermost energy level.
Grade 10 Atomic Structure
Which combination of particle and charge is correct?
  1. electron: no charge
  2. proton: positively charged
  3. electron: positively charged
  4. neutron: negatively charged
Grade 10 Atomic Structure
Grade 10 Atomic Structure

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

Grade 10 Atomic Structure

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

Grade 10 Atomic Structure
Which feature of the electron configuration determine the chemical properties of an element?
  1. Its total number of electrons
  2. The number of electrons in the first shell
  3. The number of valence electrons
  4. The number of electrons in the second shell
Grade 10 Atomic Structure
Of the 3 subatomic particles, which one has the lowest mass?
  1. protons
  2. electrons
  3. neutrons
  4. none, they all have almost the same
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