Question

Metal M, with two electrons in its valence shell (M shell), reacts with oxygen to form a compound that is slightly soluble in water. Predict its:

1. formula
2. type of bond
3. electrical conductivity of its aqueous solution

Answer 1

1. MO
2. ionic bond
3. conducts electricity

M loses two electrons to form M²⁺, while oxygen gains two to form O²⁻. Their electrostatic attraction forms MO. In water, the dissolved ions move freely and carry electric current; conductivity is relatively low because of slight solubility.