Ionization Energies

Q.

The first ionization energy of boron is less than that of beryllium because

1. Atomic size of boron is less than that of beryllium.

2. Boron has higher nuclear charge.

3. Atomic size of boron is more than that of beryllium.

4. Boron has only one electron in p-subshell.

Q. Calculate: a) First excitation energy of the electron in the hydrogen atom. b) Ionisation energy of the hydrogen atom.

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)If assertion is true but reason is false.

(d)If assertion is false but reason is true.
Assertion: Ionisation enthalpies for early actinoids are lower than that for early lanthanoids.
Reason: 5f electrons more effectively shielded from the nuclear charge than the 4f electrons
of the corresponding lanthanoids.

1. a
2. b
3. c
4. d

Q. 22. If the ionisation potential of an atom .is 20V its 1st excitation potential will b

Q.

In which of the following compounds manganese show maximum radius -

1. 

2. 

3. 

4. _6]\)

Q. Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

1. Vanadium (Z = 23)
2. Chromium (Z = 24)
3. Iron (Z = 26)
4. Manganese (Z = 25)

Q. What is the order of ionisation energy order in the 13th group of periodic table

Q. Which of the following is arranged in order of increasing second ionisation energy? Options: C < N < O < F F < C < N < O C < N < F < O F < O < N < C Here why wont the second opt. come , cause F will easily lose 1 electron and become 1/2 filled, and C would lose electron and become 2s2?

Q. The atomic numbers of V, Cr, Mn and Fe are 23, 24, 25 and 26 respectively. Which one of these may be expected to have the highest second ionization enthalpy?

1. Fe
2. V
3. Mn
4. Cr

Q. what is slaters rule? and whath is nth and (n-1) orbitals in that

Q.

Which of the following elements has the largest ionisation enthalpy?

1. O

2. C

3. N

4. F

Q. Which of the following pair of elements have same number of shells?

1. O, Cl
2. Ca, Ba
3. Na, Al
4. K, Sr

Q.

Among the alkali metals, which element has

(a) Strongest reducing character in aqueous medium

(b) lowest size of ion in aqueous medium.

Q. Select the in correct statement regarding resonatingstructures(1) Have same number of paired and unpairedelectrons(2) Have identical electronic arrangements(3) Have identical arrangements of all of the atoms(4) Have nearly same energies

Q. While converting $Ce$ to $C{e}^{3+}$, which process requires highest ionization energy?

1. $Ce$ to $C{e}^{+}$
   
2. $C{e}^{+}$ to $C{e}^{3+}$
   
3. Both A and B require the same amount of energy.
4. None of the above

Q. why is the ionization enthalpy of group 13 less than that of group 2?