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No, adding coefficients to a chemical equation does not disobey the law of definite proportion. The coefficients simply represent the relative number of moles of each substance involved in the reaction and do not alter the proportion of elements present in the compounds.
During the process of cooling, elements and compounds in solution may crystallize out to form minerals. These minerals are solid, inorganic substances with a specific chemical composition and atomic structure. They can vary in color, shape, and physical properties depending on the elements present and the conditions under which they were formed.
Uranium is found in the earth only in the form of compounds. Uranium is present in cca. 200 minerals.
Calcium is present in many minerals, but not in elemental form. Calcium cations are the chemical species present in minerals.
Carbon is present in all organic compounds.
Hydrogen is present in the greatest number of atoms, if that is what is meant by "particles" in the question.
Oxygen is present in the Earth's atmosphere, making up about 21% of the air we breathe. It is also present in water bodies, where it dissolves to support aquatic life. Additionally, oxygen is found in the Earth's crust and is a component of many minerals and compounds.
Ratios or fractions can be used to present proportions.
Because oxygen is very reactive and can form an immense number of compounds. Also oxygen is very abundant in the nature.Oxygen is a very common gas in the atmosphere. Minerals are made by oxidation of elements. So oxygen is present in most of them.
Clay minerals, quarts, feldspar
Rocks are made up of minerals, which are naturally occurring inorganic substances with a specific chemical composition and crystal structure. While minerals contribute to the formation of rocks, not all minerals are present in rocks. Rocks can contain a mixture of minerals and other materials, whereas minerals occur naturally as individual crystals or grains.
Carbon is always present in all organic compounds, but lacking in inorganic compounds. Similarly hydrogen is always present in organic compounds but are missing in inorganic compounds.