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Tenth Grade (Grade 10) Atomic Structure Questions

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Grade 10 Atomic Structure
Which of these descriptions is incorrect?
  1. proton: positive charge, in nucleus, mass of = 1 amu
  2. electron: negative charge, mass of = 0 amu, in nucleus
  3. neutron: mass of = 1 amu, no charge
Grade 10 Atomic Structure
The nucleus is made up of
  1. protons and electrons.
  2. electrons and neutrons.
  3. protons and neutrons.
  4. protons, neutrons and electrons.
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
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
Grade 10 Atomic Structure

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What is the atomic number of an atom with 20 protons, 20 electrons, and 22 neutrons?
  1. 42
  2. 22
  3. 2
  4. 20
Grade 10 Atomic Structure

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A certain isotope of oxygen has 8 protons, 6 neutrons, and 8 electrons. What is its mass number?
  1. 8
  2. 2
  3. 14
  4. 22
Grade 10 Atomic Structure
Iodine has how many valence electrons?
  1. 7
  2. 17
  3. 8
  4. 3
Grade 10 Atomic Structure
The neutral particle in an atom is called a(n)                .
  1. ion
  2. proton
  3. neutron
  4. electron
Grade 10 Atomic Structure
In which of the following ways do isotopes of the same element differ?
  1. in number of protons only
  2. in numbers of neutrons and protons
  3. in number of neutrons and in mass
  4. in number of neutrons only
Grade 10 Atomic Structure
Based on electron configurations, which of the following pairs of elements contains the same number of energy levels?
  1. sodium and beryllium
  2. magnesium and calcium
  3. lithium and neon
  4. strontium and radium
Grade 10 Atomic Structure

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Which statement correctly describes the relationship between the charge of a proton and the charge of an electron?
  1. Protons and electrons have the same charge.
  2. Protons have a lower charge than electrons do.
  3. Protons and electrons have opposite charges.
  4. Protons have a charge of 0, electrons have a charge of -1.
Grade 10 Atomic Structure

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Isotopes of an element must have different what?
  1. atomic numbers
  2. numbers of protons
  3. numbers of electrons
  4. mass numbers
Grade 10 Atomic Structure
The formula 2n^2 represents what?
  1. The number of sublevels in any energy level.
  2. The maximum number of electrons that can occupy an energy level
  3. The number of orbitals in a sublevel.
  4. None of the above
Grade 10 Atomic Structure

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

A certain isotope of sodium has a mass number of 23. How many neutrons does it have?
  1. 14
  2. 34
  3. 23
  4. 12
Grade 10 Atomic Structure
Which subatomic particles are located outside of the nucleus of an atom?
  1. Positively-charged protons.
  2. Negatively-charged positrons.
  3. Negatively-charged electrons.
  4. Neutrons.
Grade 10 Atomic Structure
What happened to some the alpha particles directed at the gold foil in Rutherford's experiment, when they struck the center of the atoms of gold?
  1. They passed through.
  2. They deflected at different angles.
  3. Their motion was disrupted, but they continued through the foil.
  4. None of the above
Grade 10 Atomic Structure
Which of the following statements are not a part of Dalton's atomic theory?
  1. All elements are composed of tiny indivisible particles called atoms.
  2. Atoms of the same element are identical.
  3. Atoms of different elements can physically mix together or can chemically combine to form compounds.
  4. All of the above are part of Dalton's Theory.
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