Given an element’s atomic number and mass number, how can you tell the number of protons and neutrons in its nucleus?
A Number of protons = mass number; number of neutrons = atomic number – mass number
B Number of protons = atomic number; number of neutrons = mass number + atomic number
C Number of protons = atomic number; number of neutrons = mass number – atomic number

The answer would be C

Explanation: When looking at a periodic table, the atomic number tells you the element’s identity as well as atomic number. For neutrons, you have to subtract the atomic number from the mass.

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).