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  • The value of valency in a group is ______.

    1 for all
    same for all
    0 for all
    differ in all
  • The atomic radius of the element lying in a group ______.

    inceases from top to bottom.
    decreases from top to bottom.
    may increase or decrease.
    remains same from top to bottom.
  • The elements in each vertical column on the periodic table usually have similar properties and are called a ______.

    periodic table
    period
    group
    property
  • The energy which is required to pull out the most loosely, held electron in an atom is ________.

    ionization energy
    metallic character
    reactivity
    potential energy
  • In a group reactivity from top to bottom _______.

    remains same
    may increase or decrease
    increases
    decreases
  • Which element has the highest first ionization energy?

    sodium
    phosphorus
    aluminium
    calcium
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