According to the work of the curies, which action would increase the radioactivity of polonium?
a. dissolve the polonium in a solvent.
b. heat the polonium until it becomes a gas.
c. expose the polonium sample to light.
d. increase the amount of polonium.

In a closed or isolated system , matter can not be created or destroyed. it can change forms but is conserved true or false

Describe the interaction that occurs between two objects with the same electrical charge.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)