Examlex
If a hydrogen atom in the ground state absorbs a photon of energy 12.09 eV,to which energy state will it make a transition?
Currencies
Systems of money in general use in particular countries or regions, facilitating trade and economic activities.
Exchange Rate
The value of one currency for the purpose of conversion to another, which determines how much one currency is worth in terms of another.
Spot Trade
A transaction for the immediate purchase or sale of a financial instrument.
Official Exchange Rate
The official exchange rate is the rate at which a country's central bank will exchange its currency for foreign currency.
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