State the reason for the following:
$(a)$ The elements of the same group have similar chemical properties.
$(b)$ The elements of the same period have different properties.

  • A
    Elements in the same group have the same number of valence electrons.
  • B
    Elements in the same group have different numbers of valence electrons.
  • C
    Elements in the same period have the same number of valence electrons.
  • D
    Elements in the same period have the same number of shells.

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Similar Questions

What is a metalloid? Name any two of them.

The atomic numbers of a few elements are given below: $10, 20, 7, 14$.
$(a)$ Identify the elements.
$(b)$ Identify the group number of these elements in the Periodic Table.
$(c)$ Identify the periods of these elements in the Periodic Table.

Up to which element was the Law of Octaves found to be applicable?

Study the variation in the atomic radii of Group $I$ elements given below and arrange them in an increasing order.
$(i)$ Name the elements which have the smallest and the largest atoms.
Group $I$ elements$Li: 52\, pm, Na: 61\, pm, K: 231\, pm, Rb: 244\, pm, Cs: 262\, pm$

$(ii)$ How does the atomic size vary as you go down a group?

Which of the following elements would lose an electron easily?

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