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Ninth Grade (Grade 9) Atomic Structure Questions

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Grade 9 Atomic Structure
The nucleus is made up of which subatomic particles?
  1. Protons and electrons
  2. Electrons and neutrons
  3. Protons and neutrons
  4. Protons, neutrons, and electrons
Grade 9 Atomic Structure
What type of ion forms when an atom loses electrons?
  1. Neutral
  2. Positive
  3. Negative
  4. Possible positive or negative
Grade 9 Atomic Structure
Number of protons is called the                     .
  1. atomic number
  2. atomic mass
  3. mass of the nucleous
  4. mass of the element
Grade 9 Atomic Structure
An atom with a charge is known as an                .
  1. isotope
  2. isomer
  3. element
  4. ion
Grade 9 Atomic Structure
What are electron shells?
  1. Things that break off of the atom.
  2. Layers that protons can peel away when they combine.
  3. A collection of large white electrons.
  4. The energy levels where the electrons orbit the atom.
Grade 9 Atomic Structure
The number of protons always changes.
  1. True
  2. False
Grade 9 Atomic Structure
How many protons are in an atom of phosphorus?
  1. 16
  2. 30.973
  3. 15
  4. 8
Grade 9 Atomic Structure
Neutrons have this charge.
  1. positive
  2. neutral
  3. negative
Grade 9 Atomic Structure
What is the central core of an atom called?
  1. electron
  2. isotope
  3. nucleus
  4. proton
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
Grade 9 Atomic Structure
What moves around outside the nucleus and is negatively charged?
  1. A proton
  2. An electron
  3. A neutron
  4. An isotope
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