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Ninth Grade (Grade 9) Atomic Structure Questions

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Grade 9 Atomic Structure
Grade 9 Atomic Structure
Which subatomic particle has a positive charge?
  1. proton
  2. neutron
  3. electron
  4. nucleus
Grade 9 Atomic Structure
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
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Grade 9 Atomic Structure
Carbon 14 is an unstable form of carbon that is slightly radioactive. What is the best explanation why it is less stable than other forms of carbon?
  1. It has a different number of protons than other forms of carbon
  2. It is missing electrons.
  3. It is a compound
  4. It has a different number of neutrons than other forms of carbon
  5. It does not occur naturally.
Grade 9 Atomic Structure
Nonpolar molecules are usually                .
  1. hydrophobic
  2. hydrophillic
  3. ionic
  4. equatorial
Grade 9 Atomic Structure
Grade 9 Atomic Structure

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

Grade 9 Atomic Structure
What does the nucleus of an atom contain?
  1. protons and neutrons
  2. protons and electrons
  3. protons only
  4. electrons only
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