Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति
11th Class
Chemistry
Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति
question_answer1)
Which of the following
statements are correct?
(a) Helium has the highest first
ionisation enthalpy in the periodic table
(b) Chlorine has less negative
electron gain enthalpy than fluorine
(c) Mercury and bromine are
liquids at room temperature
(d) In any period, atomic radius
of alkali metal is the highest