placer deposits
rainfall and temperature
sodium and helium
Nobel gases
Argon doesn't form any ions as it has completely filled orbitals and is chemically inert.
Argon is chemically inert due to the presence of completely filled orbitals. So it is does not react with other elements at STP.
minerals that are heavy,durable and chemically resistant are likely to be found in depsits
placer deposits
placer deposits
placer deposits
Clay is made up of clay minerals, and clay minerals are chemically weathered from minerals such mica and felspar.
rainfall and temperature
Unless it is "deionized water" fresh water will contain dissolved minerals. Both magnesium and silicon are likely to be in those dissolved minerals, but I cannot state with certainty if a given water sample contains them unless it has been chemically analyzed.
sodium and helium
The likely rock is gabbro, a mafic rock chemically equivalent to basalt. It consists of the minerals amphibole, pyroxene, plagioclase, and olivine.
the most common minerals in clastic sedimentary rocks are likely
Clam shells are quite durable.
Those in power are resistant to change.