Balance the nuclear reaction equation for the beta minus decay of nickel-63 by completing the missing numbers.

The superscript of nickel is

.

The subscript of copper is

.

If the valency of oxygen is 2, derive the valencies of the other elements present in the following oxides. Na2O, ZnO, Al2O3, MgO,

What is the half life of an isotope that is 75% decayed after 16 days?

What is the relationship between frequency and energy? (Director Inverse)

The half-life of tritium, or hydrogen-3, is 12.32 years. After about 24.6 years, how much of a sample of tritium will remain unchanged?

What mass of sucrose (C12H22O11) should be combined with 488 g of water to make a solution with an osmotic pressure of 8.00 atm at 290 K? (Assume the density of the solution to be equal to the density of the solvent.)

Explain the relationship between the observations and the hypothesis

Be sure to answer all parts. Be sure to report your answer to the correct number of significant figures. Determine Kb of the weak base B whose conjugate acid HB + has Ka 6.6 * 10-4.

Compare and contrast each of the following terms. mass and matter

The rate constant of a reaction is 4.7*10-3 s-1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C?

What are the pros of using steel?