A.) half - life of a radioactive substance is defined as the time during which concentration of the substance becomes half the initial value.
This temperature in units of degree Celsius is..
-78° Celsius
<span>The correct answer is 'freezing point depression'. Colligative properties depend on the concentration of molecules of a solute. Examples of other colligative properties are boiling point elevation or vapour pressure lowering. The salt causes ice on the side walk to melt because it lowers the freezing point. </span>
A because of the way it looks and how it works
