Which of the following orders is incorrect?

Which of the following statements is not correct regarding the classification of elements in the periodic table?

Maximum number of electrons in the outermost shell of $s, p, d$,and $f$ block elements are respectively:

Consider the following statements:
$I.$ The radius of an anion is larger than that of the parent atom.
$II.$ The ionization energy generally increases with increasing atomic number in a period.
$III.$ The electronegativity of an element is the tendency of an isolated atom to attract an electron.
Which of the above statements is/are correct?

Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?
$(a)$ Valence principal quantum number $(n)$
$(b)$ Nuclear charge $(Z)$
$(c)$ Nuclear mass
$(d)$ Number of core electrons.

Compare the ionization enthalpy and electron gain enthalpy values of the elements given below:

Element Description	Element	$\Delta_{i}H_1$	$\Delta_{i}H_2$	$\Delta_{eg}H$
$(i)$ Most reactive non-metal	$(A)$	$419$	$3051$	$-48$
$(ii)$ Most reactive metal	$(B)$	$1681$	$3374$	$-328$
$(iii)$ Least reactive element	$(C)$	$738$	$1451$	$-40$
$(iv)$ Metal forming dihalide	$(D)$	$2372$	$5251$	$+48$