One Angstrom (1 A) equals ̊ 10−10 m, which is 0.1 nm. This unit is commonly used in atomic and molecular dimensions.
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: