Because they are the most unreactive gases in the periodic table.
As they are in group 8/0 this means that their outer electron shell is full and therefore makes it extremely difficult to react with other elements, this also means that in order to obtain the gas, you would have to find it pure, which would also be very difficult. Many elements can be obtained by separating it from other elements it has combined with, however this does not apply to the noble gases.
Hope this has helped :)
raw material - gold, bauxite, diamond natural resource - trees, water, animals basically raw materials are ores found in their state i.e bauxite is found in the ground and aluminum is extracted from it natural resource are naturally occurring and don't need altering, generally have uses to human beings
Mendeleev's periodic table is considered a viable scientific model because it successfully organized the elements based on their properties and predicted the existence and properties of yet-to-be-discovered elements. It laid the foundation for the modern periodic table and influenced the development of our understanding of the elements and their relationships.
Minerals are naturally occurring, inorganic substances with a definite chemical composition and crystalline structure. Water (H2O) can be classified as a mineral when it is in its solid state, known as ice, as it meets the criteria of being naturally occurring and having a definite structure. However, H2O itself cannot be classified as a rock; rather, ice can be part of sedimentary structures, such as glacial ice, which is often categorized as a type of rock due to its accumulation and consolidation over time.
explain
The reaction of the wood burning is Oxidation as wood combines with air, the type of change that is occurring is a chemical change.
it is the something that can hear
A law is a description of a naturally occurring phenomenon, whereas a theory attempts to explain a law.
Most naturally occurring materials are not pure substances as they often contain mixtures of different compounds or elements. For example, minerals, rocks, and soils are composed of various elements and compounds, making them impure. Pure substances are rare in nature and are typically only found in the form of elements (like gold or silver) or compounds with a specific chemical composition (like water or salt crystals).
the answer is puntjkasdh;kd;fnk
The five characteristics of a mineral are: naturally occurring, inorganic, solid, definite chemical composition, and orderly internal structure/crystalline structure. Coal is organic in origin, derived from plant material, making it not inorganic as required by the mineral definition. A glass marble is manufactured by humans and lacks a naturally occurring origin, so it does not meet the criteria of being naturally occurring.
Coal is not a mineral because it does not have a crystalline structure, which is a key characteristic of minerals. Instead, coal is a naturally occurring organic sedimentary rock made up of the remains of plants and animals that have undergone compaction and chemical changes over millions of years.
A diamond in a store does not contain carbon from any prehistoric animal. Diamonds are formed at depths of over 100 miles from naturally occurring carbon, and diamonds discovered on the surface of Earth are at least one billion years old, predating the evolution of dinosaur species.
Mass number is the average of all the naturally occurring isotopes of that element. When calculated, this average is not a whole number.
The discovery of the order of elements calcium, gold, and iron is attributed to their differing reactivities. Calcium is more reactive than gold and iron is less reactive than both. This reactivity trend helps explain why these elements were discovered in that particular order historically.
To be a mineral, a substance must be naturally occurring, inorganic, solid, have a definite chemical composition, and have an ordered atomic structure. Coal is organic in origin, formed from the remains of plants; therefore, it is not a mineral. A glass marble is man-made and lacks a naturally occurring origin, so it also does not meet the criteria to be considered a mineral.
no
I'm unable to see the illustration you mentioned, but if you describe it, I can help explain the process occurring in it.