Carbon-14 weighs 14 amu. If 6 of that 14 is because of the protons and the rest of the mass is because of the neutrons, how many neutrons does it have? (Remember, each neutron weighs 1 amu.)

a c d and f

just finished the assignment

where's the diagram?

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).

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.