Answer:
Al
Explanation:
The reduction potentials of the metals are
Al= -1.66
Zn= -0.76
Cu= +0.34
Pb= -0.13
Hence All has the most negative reduction potential and is the most reducing element among all the elements listed.
Answer:
See explanation
Explanation:
Air contains a mixture of several molecules and compounds such as oxygen and carbon dioxide.
The half-life of Plutonium−239, t1/2 is 2.41 × 10⁴<span> yrs
time taken to reach tolerable level = seven half-lives
= 7 x t1/2
= 7 x </span>2.41 × 10⁴ yrs
= 168700 yrs
= 1.687 x 10⁵ yrs
Hence, the period of time that <span>Plutonium-239 must be stored is </span>1.687 x 10⁵ years.