Question Bank: ATOMS

What discovery did J. J. Thomson make in 1897?

According to Thomson's plum pudding model, how is positive charge distributed in an atom?

Which model proposed that electrons move around a dense nucleus?

What is the overall charge of an atom?

Which radiation spectrum is observed in rarefied gases?

Who performed the alpha particle scattering experiment?

What aspect of atomic structure posed a challenge to Rutherford's model?

What is the role of electrons in an atom?

What concept did the Balmer formula relate to?

In the plum pudding model, what do the electrons represent?

How did Rutherford estimate the size of the nucleus?

What concept explains why certain colors are seen in hydrogen's spectrum?

What incorrect assumption does the classic planetary model of atoms rely on?

Which of the following best describes the atomic nucleus?

What phenomenon results in spectral lines rather than a continuous spectrum in gases?

What did Rutherford's alpha-particle scattering experiment primarily demonstrate?

What is the approximate size of the nucleus according to Rutherford's model?

During the alpha scattering experiment, why do most alpha particles pass through the gold foil without deflection?

What assumption about the nucleus was crucial for analyzing Rutherford's scattering data?

Which of the following best describes the trajectory of an alpha particle close to a nucleus?

What role did Hans Geiger and Ernest Marsden play in the alpha-particle scattering experiment?

According to Rutherford's model, which part of the atom contains the positive charge?

What is the significance of the impact parameter in the context of alpha-particle scattering?

What did Rutherford's nuclear model fail to explain?

In Rutherford's scattering experiment, what primarily caused the deflection of an alpha particle?

What did Rutherford use to infer the existence of the atomic nucleus?

In the Rutherford model, electrons are compared to what in the solar system?

Which element was primarily used in Rutherford's scattering experiments?

What determines the angle of deflection of an alpha particle during scattering?

What is the energy of the ground state of a hydrogen atom?

How much energy is required to excite an electron in hydrogen from n=1 to n=2?

Which quantum number indicates the energy level in hydrogen atom transitions?

When an electron transitions from n=3 to n=2 in hydrogen, what happens?

According to Bohr's model, what characterizes an excited state of the hydrogen atom?

What is the primary cause of spectral lines in hydrogen?

If a hydrogen atom transitions from n=4 to n=1, which spectrum will be observed?

What happens to the spacing between energy levels as n increases?

What is the result of exciting a hydrogen atom to n=3?

Which of the following is true about the ionization energy of hydrogen?

In the context of line spectra, absorption lines are formed when light is:

When light passes through hydrogen, the dark lines in the spectrum are caused by:

If the frequency of emitted photon during a transition from n=3 to n=2 in hydrogen is 6.5 x 10^14 Hz, what is the energy of the photon?

What does the term 'line spectrum' refer to?

Calculating the wavelength of the emitted photon for n=3 to n=2 transition requires what initial value?

What type of spectrum is formed when an atomic gas emits radiation at specific wavelengths?

In atomic spectra, what occurs when an electron transitions from a higher energy state to a lower energy state?

Which principle explains why certain wavelengths appear in the emission spectra of different elements?

When light of a specific frequency passes through a cool gas, what type of spectrum is produced?

What determines the energy of emitted photons in an atomic spectrum?

In a hydrogen atom, what is the wavelength of the emitted light when an electron moves from n = 3 to n = 2?

What does the quantum number 'n' represent in the context of electron transitions?

Which equation is used to relate the frequency of the emitted light to the energy levels of an atom?

What characteristic of light is primarily responsible for the colors seen in an atomic spectrum?

Which experimental observation confirmed the existence of atomic spectra?

Which of the following transitions would emit the highest energy photon in a hydrogen atom?

What principle explains the emission of specific frequencies from an atom?

Which physical constant relates energy and frequency of light?

Which phenomenon explains the appearance of dark lines in an absorption spectrum?

What does it mean for the angular momentum of an electron to be quantized?

What is the significance of the hydrogen atom emission spectrum in the development of quantum mechanics?

What is the principal quantum number for the ground state of the hydrogen atom?

According to Bohr's model, what does an electron do when it transitions from a higher energy level to a lower energy level?

What is the energy of the ground state of the hydrogen atom according to Bohr's model?

In Bohr's model, which quantity is quantized for electrons in stable orbits?

What is the ionization energy of a hydrogen atom as per Bohr's model?

According to Bohr's model, what is the relationship between frequency and wavelength of emitted radiation?

What does Bohr's second postulate imply about angular momentum?

Which of the following correctly describes the spectrum produced by hydrogen when an electron falls from a higher state to a lower state?

In Bohr's model, the radius of the nth orbit of the hydrogen atom is proportional to which power of n?

Why can't the Bohr model explain the spectra of multi-electron atoms?

What is the role of de Broglie's hypothesis in Bohr's model?

In the context of Bohr’s model, which factor does NOT affect the energy of the electron in an orbit?

How does the energy difference between two levels relate to the frequency of emitted light?

What does de Broglie's hypothesis assert about electrons?

According to Bohr's second postulate, what is quantized?

For which type of atoms is Bohr's model applicable?

What is the equation representing Bohr’s quantization condition?

De Broglie's wave equation for an electron includes which variable?

What does the concept of standing waves in Bohr's model imply?

Why can't Bohr's model explain the spectral intensities observed in hydrogen?

What physical principle does de Broglie's explanation connect with Bohr's quantization?

What condition must be satisfied for an electron's orbit according to de Broglie's hypothesis?

In Bohr's model, what does the principal quantum number 'n' represent?

Which experimental evidence confirmed de Broglie’s hypothesis?

From which principle does the quantization of angular momentum arise in Bohr's model?

What was a major limitation of Bohr's model when applied to multi-electron systems?

What conclusion can be drawn from Bohr's model regarding electron orbits?