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Question
First ionisation enthalpy of two elements X and Y are 500 kJ mol−1 and 375 kJ mol−1 respectively. Comment about their relative position in a group as well as in a period.
Solution
Ionisation Enthalpy or potential is highest on the right side of the periodic table and lowest on the left side. Elements X and Y seem to be metals, which are on the left side of the table. Group I metals lose one electron each. Ionisation Enthalpy decreases in groups from top to bottom. In the IA group, X represents Sodium (Na) and Y represents Caesium (Cs). Also, X is in the third period and Y is in the sixth.
RELATED QUESTIONS
Represent ionisation potential in the form of an equation. In which unit it is measured?
Choose the correct answer.
An element with highest ionization potential
(i) Calesium
(ii) Fluorine
(iii) Helium
(iv) Neon
Arrange the following in increasing order of property indicated
Li, Be, B (ionization energy)
State whether the ionization potential increases or decreases on going down a group.
Supply the missing word from those in the brackets:
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The metals of group 2 from top to bottom are: Be, Mg, Ca, Sr, Ba. Which of these metals will form ions most readily and why?
which element has the highest ionisation potential.
Across a period, the ionization potential ______.
With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Give reason:
Ionisation potential of the element increases across a period from left to right.
