The first ionization energy of neon is 2080.7 KJ/mole. The first of ionisatioin energy of helium may be 

Options

A. 2080.7 KJ/mole
B. 2372.3 KJ/mole
C. 1520.5 KJ/mole
D. 1800.4 KJ/mole

Answer

To determine the first ionization energy of helium based on the given information about neon, we can follow these steps:

### Step 1: Understand Ionization Energy
Ionization energy is the energy required to remove an electron from an atom in its gaseous state. Noble gases have high ionization energies due to their stable electron configurations.

### Step 2: Analyze the Given Data
The first ionization energy of neon (Ne) is provided as 2080.7 kJ/mole. We need to find the first ionization energy of helium (He).

### Step 3: Consider the Position of Helium and Neon
Helium is located above neon in the periodic table. In general, for noble gases, the ionization energy decreases as you move down the group from helium to neon. This means that helium should have a higher ionization energy than neon.

### Step 4: Compare Ionization Energies
Given that the ionization energy of neon is 2080.7 kJ/mole, and knowing that helium is above neon in the periodic table, we can conclude that the first ionization energy of helium will be greater than that of neon.

### Step 5: State the Expected Value
From known data, the first ionization energy of helium is approximately 2372.3 kJ/mole, which is indeed greater than 2080.7 kJ/mole.

### Conclusion
The first ionization energy of helium is approximately 2372.3 kJ/mole.

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