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Atomic Structure Questions - All Grades

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Grade 9 Atomic Structure
Why does an atom have no net electric charge?
  1. Its subatomic particles carry no electrical charge.
  2. The positively charged protons cancel out the negatively charged neutrons.
  3. The positively charged neutrons cancel out the negatively charged electrons.
  4. The positively charged protons cancel out the negatively charged electrons.
Grade 9 Atomic Structure
What are the three particles that make up an atom?
  1. protons, neutrons, and isotopes
  2. neutrons, isotopes, and electrons
  3. positives, negatives, and electrons
  4. protons, neutrons, and electrons
Grade 8 Atomic Structure
Grade 11 Atomic Structure
In chemistry, we describe an atom as
  1. the tiniest unit of matter that keeps its characteristic chemical identity.
  2. the simplest unit of a compound.
  3. always being made up of carbon.
  4. being smaller than an electron.
Grade 9 Atomic Structure
What does the octet rule state?
  1. Atoms become less stable with eight electrons in their outer energy level.
  2. Atoms become more stable with eight electrons in their outer energy level.
  3. Atoms will change their configurations and become a noble gas.
  4. Atoms will become more reactive and chemically bond with noble gases.
Grade 5 Atomic Structure
What makes up all matter on Earth?
  1. Oxygen
  2. Bones
  3. Atoms
  4. Neutrons
Grade 9 Atomic Structure
Which particles make up atoms?
  1. protons, neutrons, electrons
  2. protons, electrons, nuclei
  3. electrons, neutrons, ions
  4. neutrons, electrons, molecules
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 11 Atomic Structure
Which ion's configuration matches that of the noble gas whose electron-dot diagram is below?
Electron-Dot Diagram - Argon
  1. [math]"N"^"3-"[/math]
  2. [math]"Rb"^"+"[/math]
  3. [math]"Ca"^"2+"[/math]
  4. None of the above
Grade 10 Atomic Structure

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

Grade 9 Atomic Structure
Which subatomic particle has a positive charge?
  1. proton
  2. neutron
  3. electron
  4. nucleus
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