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Atomic Structure (Grade 8)

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Atomic Structure

1. 
A negatively charged particle moving around the nucleus of an atom
  1. Compound
  2. Electron
  3. Atom
 
2. 
A positively charged particle in the nucleus of an atom
  1. Electron
  2. Proton
  3. Element
3. 
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.
 
4. 
What is an isotope
  1. An element with equal number of protons and neutrons
  2. An elements with differing numbers of protons and electrons
  3. An element with differing number of protons and neutrons
  4. An element with equal number of protons and electrons
5. 
Compared to the charge and mass of a proton, an electron has
  1. the same charge and a smaller mass
  2. the same charge and the same mass
  3. opposite charge and smaller mass
  4. opposite charge and the same mass
 
6. 
A proton has approximately the same mass as
  1. a neutron
  2. a beta particle
  3. an alpha particle
  4. an electron
7. 
The electron cloud is a visual model of the probable locations of electrons in an atom.
  1. True
  2. False
 
8. 
What is the nucleus made of?
  1. protons
  2. electrons
  3. neutrons
  4. protons and electrons
  5. protons and neutrons
  6. electrons and neutrons
9. 
Neutrons are found in the rings around the Bohr-Rutherford diagram.
  1. True
  2. False
 
10. 
If atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have
  1. no valence electrons
  2. 7 valence electrons
  3. 8 valence electrons
  4. 17 valence electrons
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