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periodic table

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  • the number of protons + neutrons in the atom
    mass number
  • mendeleev's periodic table contains alot of isotopes
    true
  • Mendeleev classified .................... elements on 1871
    67
  • .....................revolve around the nucleus in fixed orbits called.........................
    electrons-energy levels
  • ..................discovered that the nucleus of the atom contains positively charged protons.
    Rutherford
  • Moseley arranged elements in an ascending order according to their
    atomic number
  • f-block is located on the left of the table
    false -below
  • Na element with 11 atomic number.in which period and group is it?
    group 1 period 3
  • mendeleev arranged elements in an ascending order according to their .....................
    atomic weight
  • ....................elements are classified in the modern periodic table , ........ elements are found naturally
    116-92
  • is the number of protons in the nucleus
    atomic number
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