Structure of an Atom

What is the smallest unit of matter that cannot be broken down chemically?

• Molecule

• Atom

• Electron

• Proton

Fill in the blank: Each shell has a specific ______ energy.

• A) Binding

• B) Free

• C) Core

• D) Nucleus

What creates X-ray photons?

• Interaction of energetic electrons with matter at atomic level

• Interaction of protons with matter

• Interaction of neutrons with matter

• Interaction of atoms with matter.

The particle concept is used to describe interaction between ______ and matter.

• Radiation

• Light

• Sound

• Heat

What determines the direction of the scattered photon in Compton Scattering?

• The initial energy of the photon

• The angle of deflection

• The type of atom

• The temperature

What is one of the outcomes when an x-ray photon undergoes Compton Scattering?

• It is absorbed by the nucleus

• It creates a new photon

• It deflects and creates a recoil electron

• It passes through without interaction.

What happens to a photon with low energy?

• It travels straight

• It scatters back at an angle of 180°

• It loses all its energy

• It stops moving

What are the end products of the photoelectric effect?

• Characteristic radiation, Negative ion, Positive ion

• Gamma rays, Neutrons, Protons

• X-rays, Electrons, Neutrons

• Alpha particles, Beta particles, Gamma rays.

What is a disadvantage of the photoelectric effect?

• Excellent radiographic images

• Enhances natural tissue contrast

• Maximum radiation exposure

• Magnifies tissue differences.

Fill in the blank: In the Compton effect, the electron is ______ bound.

• A) Tightly

• B) Loosely

• C) Not

• D) Strongly