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How many zones is the world divided?

4 the spray zone the upper intertidal zone the mid intertidal zone the lower intertidal zone


Why cant an atom in the ground state produce emission lines?

An atom in the ground state does not have any electrons excited to higher energy levels. Without these excited electrons transitioning back to lower energy levels, there is no emission of photons with specific wavelengths that correspond to emission lines.


What statement of emission spectra is correct?

Emission spectra consist of discrete, colored lines at specific wavelengths, corresponding to the emission of photons as electrons transition from higher to lower energy levels. Each element has a unique emission spectrum due to its specific electron configuration and energy levels. Emission spectra are useful for identifying elements present in a sample and are commonly used in analytical chemistry and astronomy.


How do different metals affect emission of electrons?

Different metals have different work functions, which determine the amount of energy required to remove an electron from the surface of the metal. Metals with lower work functions typically exhibit higher electron emission because it requires less energy to release an electron. Additionally, the surface properties of the metal can affect electron emission, such as roughness or cleanliness, which can impact the efficiency of the emission process.


What is the process in which an electron returns to a lower energy level and emits a photon?

This process is called "emission." When an electron transitions from a higher to a lower energy level within an atom, it releases a photon of light corresponding to the energy difference between the two levels. This emitted photon carries away the energy that the electron lost during the transition.