There's 6.022×10^23 particles in 1 mole of anything
like there is 1000 grams in 1 kilogram of anything
Resources that come from nature, some examples include: Water, Gold, Oil, Coal, Apples, Oranges, etc.
It's known as the greenhouse effect.
The crust of the Earth is thickest beneath the continents.
Moseley established a more accurate periodic table by closer determination of atomic numbers. Through the results of his measurements of the wavelengths of the X-ray spectral lines of a number of elements which showed that the ordering of the elements by atomic number.