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Question
The element with highest ionisation potential is ______.
Options
Hydrogen
Caesium
Radon
Helium
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Solution
The element with highest ionisation potential is Helium.
RELATED QUESTIONS
Give reason for the following:
Ionisation potential of the element increases across a period.
Which element from the following has the highest ionization energy?
Explain your choice.
P, Na, CI
Supply the missing word from those in the brackets:
If an element has a low ionization energy then it is likely to be ______ (metallic/ non-metallic).
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Arrange the following as per instruction given in the bracket.
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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.
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Explain your choice.
Give reason:
Ionisation potential of the element increases across a period from left to right.
Ionisation Potential values depend on the nuclear pull. Explain.
This question refers to the elements of the Periodic Table with atomic numbers from 3 to 18. Some of the elements are shown by letters, but the letters are not the usual symbols of the elements.
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| A | B | C | D | E | F | G | H |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| I | J | K | L | M | N | O | P |
Which of these have least Ionisation Energy?
