Answer:
A
Explanation:
I guess it's a, because nuclear decay is likely to occur when either the mass or atomic number is greater than 83.
The answer would be option 4
<span>Deep geological disposal is widely agreed to be the best solution for final disposal of the most radioactive waste produced.
</span>Geological disposal<span> involves isolating radioactive waste </span>deep<span> inside a suitable rock volume to ensure that no harmful quantities of radioactivity ever reach the surface environment.
</span>
Hope this helps :)
Answer:
sodium sulphide.
Explanation:
First, let us obtain the percentage of sulphur in both compounds. This is illustrated below:
For sodium sulphide(Na₂S):
Molar Mass of Na₂S = (23x2) + 32 = 46 + 32 = 78g/mol
Percentage of sulphur in Na₂S is given by:
32/78 x 100 = 41%
For zinc sulphide(ZnS):
Molar Mass of ZnS = 65.4 + 32 = 97.4g/mol
Percentage of sulphur in ZnS is given by:
32/97.4 x 100 = 33%
From the results obtained sulphur has the highest percentage by mass in sodium sulphide.
