Question

The set representing the correct order of first ionisation energy is

Solution

Correct option is

Be > Mg > Ca

 

In a group, when we move from top to bottom, ionisatin energy decreases due to increase in size. The correct order of first ionisation energy is

                          Be > Mg > Ca.

SIMILAR QUESTIONS

Q1

In which one of the following pairs the radius of the second species is greater than that of the first?

Q2

The increasing order of the first ionisation enthalpies of elements B, P, S and F (lowest first) is

Q3

The element having highest electron affinity is

Q4

Diagonal relationship is for

Q5

The correct order according to size is

Q6

 

The successive ionisation energy values for an element ‘X’ are given below: 

1st ionisation energy = 410 kJ mol–1

2nd ionisation energy = 820 kJ mol–1

3rd ionisation energy = 1100 kJ mol–1

4th ionisation energy = 1500 kJ mol–1

5th ionisation energy = 3200 kJ mol–1

Find out the number of valence electrons for the atom ‘X’. 

Q7

In which of the following arrangement the order is not according to the property indicated against it?

Q8

Which is the correct order of electronegativity?

Q9

The order of first ionisation energies of the elements Li, Be, B, Na is

Q10

An element with atomic number 106 has been discovered recently. Which of the following electronic configurations will it possess?