Emission spectra Multiple Choice cannot be used to identify an unknown atom. can be used to identify unknown atoms. can be explained by the movement of protons colliding with electrons. None of these choices.

Emission spectra can be used to identify unknown atoms.

Explanation:

Emission spectra -

Emission spectra refers to the series of frequencies of an electromagnetic radiations, which is radiated when an excited atom or molecule (i.e., the atom in the higher level of energy ), bounces back to its lower energy level, is called an emission spectra.

The main purpose of using a emission spectra is to determine any unknown atom.

Hence, from the given options of the question,

The correct statement regarding emission spectra is - can be used to identify unknown atoms.

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation:

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.