The mode is the value that appears most frequently in a data set. From Table 1, we can see that the value 56 has a frequency of 4, which is higher than the frequency of any other value. Therefore, the mode is 56.
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: