The statement that is true for the long form of the periodic table is

  • A
    It reflects the sequence of filling the electrons in the order of sub-energy levels $s$,$p$,$d$,and $f$
  • B
    It helps to predict the stable valency states of the elements
  • C
    It reflects trends in physical and chemical properties of the elements
  • D
    All of the above

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Similar Questions

Which of the following order$(s)$ is/are correct?
$(1) Li < Be < B < C$ $(IE_1)$
$(2) Li < Na < K < Rb < Cs$ (Reducing power in gaseous state)
$(3) Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$ (Ionic mobility in aqueous solution)
$(4) S > Se > Te > O$ $(EA)$

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Which of the following statements are $NOT$ true about the periodic table?
$A.$ The properties of elements are a function of atomic weights.
$B.$ The properties of elements are a function of atomic numbers.
$C.$ Elements having similar outer electronic configuration are arranged in the same period.
$D.$ An element's location reflects the quantum numbers of the last filled orbital.
$E.$ The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.
Choose the correct answer from the options given below:

State whether the following statements are true or false:
$(i)$ Higher the ionization enthalpy,lower the screening effect.
$(ii)$ The ionization enthalpy of $Be$ is higher than that of $B$.
$(iii)$ The shielding effect increases as we move from left to right in a period.
$(iv)$ The increasing order of the first ionization energy is $B < Be < O < N$.

Which of the following orders is incorrect?

Elements having atomic numbers $33, 47, 53, 59, 68, 74, 82$ are present in which blocks of the periodic table?

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