Quiz on Atomic Structure

What did Dalton propose in his atomic theory?

• All matter consists of tiny particles called atoms

• Atoms are made of protons and neutrons only

• Atoms can be created and destroyed

• Atoms are the largest building blocks of matter

What model did Thomson develop?

• Nuclear model

• Quantum model

• Plum pudding model

• Planetary model

What did Rutherford's gold foil experiment reveal?

• Electrons are negatively charged

• Atoms are indivisible

• Atoms have fixed energy levels

• Presence of a dense nucleus

What is the main feature of Bohr's atomic model?

• Electrons have no mass

• Electrons are in random paths

• Electrons are located in the nucleus

• Electrons are in fixed orbits

What is a weakness of Bohr's atomic model?

• Cannot explain multi-electron atoms

• Explains the hydrogen spectrum

• Describes electron orbits accurately

• Accounts for the dual nature of light

What does the Lyman series correspond to?

• Transitions to n=2

• Transitions to n=3

• Transitions to n=4

• Transitions to n=1

What is the energy of an electron in the ground state of hydrogen?

• 2.18 x 10^-18 J

• 1.09 x 10^-18 J

• 4.36 x 10^-18 J

• 0 J

What is the relationship between frequency and wavelength?

• Lower frequency means shorter wavelength

• They are inversely proportional

• Higher frequency means longer wavelength

• Frequency is independent of wavelength

What is the formula for calculating the energy of a photon?

• E = mc^2

• E = hf

• E = mv^2

• E = 1/2 mv^2

What happens when an electron falls from a higher to a lower energy level?

• Energy is absorbed

• Electron is ionized

• Energy is emitted as light

• No energy change occurs