Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 20163 April

Exam: JEE Main
Year: 2016
Date: 3 April
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

JEE Main 2016 · 3 April · Chemistry · Classification of Elements and Periodicity in Properties

Which of the following atoms has the highest first ionization...

Which of the following atoms has the highest first ionization energy?

Options

A $K$
B $Sc$
C $Rb$
D $Na$

Correct answer

B. $Sc$

Step-by-step solution

Ionisation energy decreases with increase in the size of atom. $Na, K, Rb$ belongs to alkali metal and down the group ionization energy decreases as size of atom increases down the group. Among the given elements, $Sc$ being small has the highest ionization energy $( Na = 496, K = 419; Sc = 631kJ{mol}^{- 1} )$

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

The correct statement(s) regarding the periodic properties of elements is(are) JEE Advanced 2026 Match List-I with List-II. List-I Electronic configuration of neutral atom (where n=2 )… JEE Main 2026 In a period, the first ionisation enthalpy of the element at extreme left and the… JEE Main 2026 Given below are two statements: Statement I: Aluminium is more electropositive than… JEE Main 2026 Given below are two statements : Statement I: The number of pairs among [Al_2O_3… JEE Main 2026 Given below are two statements: Statement I: The correct order of electronegativity of… JEE Main 2026 The 1^ st ionization enthalpy for Mg is +737 kJ/mol. The most probable estimated value of… JEE Main 2026 The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale… JEE Main 2026 Full Classification of Elements and Periodicity in Properties list All JEE Main PYQs