Question : The element with highest first ionisation energy is:
Option 1: Hydrogen
Option 2: Helium
Option 3: Lithium
Option 4: Sodium
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Correct Answer: Helium
Solution : The correct option is Helium.
Ionisation energy is the energy required to remove an electron from a neutral atom, forming a positively charged ion. Helium has the highest ionisation energy because it has the smallest atomic size among all the elements and a full electron shell (1s²), making it very stable and resistant to losing its electrons. This results in a high energy requirement to remove an electron from a helium atom.
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Question : In addition to hydrogen, the other abundant element present on the Sun's surface is:
Option 1: Helium
Option 2: Neon
Option 3: Argon
Option 4: Oxygen
Question : What chemical element does ‘H’ stand for in the science periodic table?
Option 2: Hydrogen
Option 3: Holmium
Option 4: Mercury
Question : What chemical element does "H" stand for in the periodic table of science?
Option 2: Mercury
Option 4: Hydrogen
Question : The element involved with blood clotting is:
Option 1: phosphorus
Option 2: calcium
Option 3: iron
Option 4: sodium
Question : __________is the heaviest naturally occurring element of the Periodic Table with an atomic weight of 238.
Option 1: Xenon
Option 2: Uranium
Option 3: Helium
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