Read the article and then answer these questions.

Radium and Polonium

How does she explain the activity of uranium when amounts of this element are changed? How does she describe the activity of uranium when physical changes of state or chemical transformations occur? Which summary statement does she make to describe the property of radioactivity?

Chemical compounds are active in direct proportion to the amount of uranium in them.

Activity is not destroyed by physical changes of state or chemical transformations.

Radioactivity is an atomic property of matter.

Explanation:

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l