Low concentration replicate samples of Cd-EDTA gave the following counts in a mass spectral measurement: 195.9, 149.6, 159.3, 174.3, 143.3, 212.7, 164.3, 168.9, 158.3, 175.9. Ten measurements of a blank had a mean of 36.9 counts. A sample containing 2.00 ?M Cd-EDTA gave 1611 counts. Estimate the signal and concentration detection limits for Cd-EDTA.

3 hours because it is a decent distance.

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).