Atomo Flashcards
What is an atomic spectrum?
An atomic spectrum is the spectrum of electromagnetic radiation emitted or absorbed by an atom.
True or False: The atomic spectrum is unique for each element.
True
Fill in the blank: The energy levels of an atom are quantized, meaning they can only take on specific _____ values.
discrete
What causes the emission of light in atomic spectra?
Light emission occurs when electrons transition from a higher energy level to a lower energy level.
What is the difference between absorption and emission spectra?
Absorption spectra show dark lines on a continuous spectrum where light has been absorbed, while emission spectra show bright lines on a dark background where light has been emitted.
Which type of spectrum is produced when white light passes through a cold gas?
Absorption spectrum
What is the principal quantum number?
The principal quantum number indicates the main energy level of an electron in an atom.
True or False: Electrons can exist between energy levels in an atom.
False
What is the role of the electromagnetic spectrum in atomic spectra?
The electromagnetic spectrum includes all possible frequencies of electromagnetic radiation, which are involved in the absorption and emission processes of atoms.
What is a line spectrum?
A line spectrum consists of discrete lines, each corresponding to a specific wavelength emitted by an atom.
Fill in the blank: The color of light emitted by an atom is determined by the _____ of the transition between energy levels.
wavelength
What device is used to separate light into its component wavelengths?
Spectroscope
True or False: The Balmer series corresponds to transitions in the hydrogen atom.
True
What is the formula for the wavelength of emitted light in the hydrogen spectrum?
1/λ = R(1/n1² - 1/n2²) where R is the Rydberg constant.
What is the significance of the Rydberg constant?
The Rydberg constant is a physical constant that relates to the wavelengths of spectral lines of hydrogen.
Which region of the electromagnetic spectrum do atomic emissions typically fall into?
Visible light region
Fill in the blank: The _____ effect explains the splitting of spectral lines in the presence of a magnetic field.
Zeeman
What is the photoelectric effect?
The photoelectric effect is the emission of electrons from a material when it absorbs light of sufficient energy.
True or False: Higher energy transitions emit light of longer wavelengths.
False
What is the significance of quantum mechanics in understanding atomic spectra?
Quantum mechanics provides the framework for understanding the quantization of energy levels and the behavior of electrons in atoms.
What is the relationship between frequency and wavelength in electromagnetic radiation?
Frequency and wavelength are inversely related; as frequency increases, wavelength decreases.
What does the term ‘forbidden transitions’ refer to in atomic spectra?
Forbidden transitions are transitions that are not allowed by selection rules, resulting in very weak or absent spectral lines.
Fill in the blank: The _____ principle states that no two electrons in an atom can have the same set of four quantum numbers.
Pauli exclusion
What type of radiation is primarily associated with transitions from the ground state to higher energy states?
Ultraviolet radiation
What is a continuous spectrum?
A continuous spectrum displays a seamless range of wavelengths without any gaps.
Quale la prova che nell’atomo esistono solo certi livelli energetici?
Righe spettro di emissione e di assorbimento
Che valori può assumere l’energia negli atomi?
Solo Valori discretive e specifici0
Cos’è la costante di rydberg
Una costante empirica correlata con la frequenza delle righe spettrali dell’idrogeno
Da cosa dipende il colore della radiazione?
Dalla frequenza
Come sono collegate frequenza e lunghezza d’onda ,?
Sono inversamente proporzionali
Quale è la velocità di qualsiasi radiazione elettromagnetica?
C=velocità della luce
