thermometer is when tin chemically reacts with land and space
tin_ii_ion is not tin_atom. flux is chemical. tin_iv_ion is tin_atom. tin_ii_ion is not variable_charge_cation. flux is not chemical. gas_thermometer is thermometer. mercury_thermometer is thermometer. tin_ii_ion is tin_atom. tin_ii_ion is variable_charge_cation. gas_thermometer is not thermometer.