What was the initial understanding of atoms before Rutherford's model?

• Atoms were solid spheres of positive charge with negative electrons mixed throughout.

• Atoms were composed of a dense nucleus with electrons orbiting around it.

• Atoms were considered to be indivisible particles.

• Atoms were made up of only positive charges.

According to Rutherford's model, how are electrons arranged around the nucleus?

• Electrons rotate around the nucleus like planets around the sun.

• Electrons are embedded within the nucleus.

• Electrons are stationary around the nucleus.

• Electrons are mixed throughout the atom.

What was the major flaw in Rutherford's atomic model?

• Atoms should not have any electrons.

• Electrons should remain stationary around the nucleus.

• Electrons should rapidly spiral into the nucleus according to classical physics.

• The nucleus should not have a positive charge.

What was Niels Bohr's solution to the problem in Rutherford's model?

• Electrons are stationary within the nucleus.

• Electrons can occupy any orbit around the nucleus.

• Electrons can only occupy certain fixed orbits around the nucleus.

• Electrons do not exist around the nucleus.

What inspired Bohr's idea of fixed orbits for electrons?

• Quantum theory of light and energy

• Newtonian mechanics

• Classical physics

• Gravitational theory

Who developed a matrix-based mathematical description of atoms supporting Bohr's view?

• Werner Heisenberg

• Niels Bohr

• Erwin Schrodinger

• Albert Einstein

What was the essence of the debate between Schrodinger and Bohr?

• Whether the electron was a particle or a wave

• Whether the nucleus was positively or negatively charged

• Whether atoms existed or not

• Whether electrons were stationary or moving

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What did Heisenberg realize about observing an electron?

• Electrons cannot be observed.

• Observing an electron changes its location.

• Observing an electron does not affect its position.

• Electrons are always stationary.

What does Heisenberg's uncertainty principle state?

• It is possible to measure both the position and momentum of a particle accurately.

• The more you know about a particle's position, the less you know about its momentum.

• The more you know about a particle's momentum, the more you know about its position.

• Particles do not have momentum.

What is the modern-day theory of the quantum principle?

• Electrons do not exist.

• Electrons are point particles with a probability of being found at any point given by a wave.

• Electrons are only particles.

• Electrons are only waves.

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