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Atomic construction

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  • Iron (Fe) has atomic number 26 and number of neutrons =30, the number of protons =.....and electrons=...........and mass number =.................
    protons =6, electrons =6 and mass number = protons +neutrons = 26 +30= 56
  • The smallest building unit of matter which share in chemical reactions is the .............
    Atom
  • 2) The energy level which has the lowest energy is ………level while the level which has the highest energy is............. level
    K level has the lowest energy , Q has the highest
  • Level (K) is saturated by……….electrons while level (L )is saturated by……..electrons
    K filled by 2 and( L) level filled by 8
  • The number of energy levels in the heaviest atom =.........................
    7 energy levels
  • Number of protons in the nucleus
    Atomic number
  • The sum of protons and neutrons
    mass number
  • The atom is neutral.why?
    because,Number of negative electrons = Number of the positive protons
  • potassium has 19 protons and 20 neutrons, the number of electrons =.............and atomic number =.........and mass number =...............
    electrons = protons = 19, atomic number = protons =19 and mass number = protons +neutrons = 20 +19= 39
  • 1)………… are imaginary places or levels in which the electrons revolve around the nucleus.
    Energy levels
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