Class VI

Which of the following is the LEAST heaviest?
  1. Neutron
  2. Hydrogen atom
  3. Electron
  4. Proton
What is the charge assigned to the electrons?
  1. Positive
  2. No charge
  3. Zero
  4. None of the above
What are most atoms made of?
  1. Molecules
  2. Water
  3. Electrons, protons and neutrons
  4. None of the above
Carbon is a common element. Did you know that diamond and coal are both made of carbon. The atomic weight of carbon(atomic number 6) is 12. How many neutrons does it have?
  1. 6
  2. 12
  3. 4
  4. 0
Nitrogen too is a common element. Nearly four fifths of the air we breathe is nitrogen. If the atomic weight of Nitrogen is 14, and it has 7 neutrons, then how many electrons does N have?
  1. 8
  2. 6
  3. 14
  4. 7
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