1. How many electrons in a silicon atom have n = 3 as one of their quantum numbers?

2. How many electrons in a potassium atom have l = 0 as one of their quantum numbers?

3. How many electrons in a mercury atom have n = 4 as one of their quantum numbers?

i'm assuming that the correct answer is indeed the first one/ "a"..

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

the answer is true. hope it .

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.