The answer:
for the monoatomic <span>selenium ions
</span> -the ion charge of selenium is 2-, so the answer is [Se]2+
as for the monoatomic phosphorus ions
-the ion charge of phosphorus is 3-, so the answer is [P]3-
SI unit of frequency is Hertz(Hz)
Overuse of the same chemicals can result in the pest becoming immune to the pesticides.
Heat moves easily through good conductors of heat (such as metals) and very slowly through heat insulators (such as wood or plastic).
:)
