MidRev8: Modern Atom and Radiation

A series of specific colors of light that can identify an element is referred to as - - -.

• aura
• bright-line spectrum
• electromagnetic spectrum
• radiation

Which of the following is NOT known to be released during radioactive decay?

• alpha particles
• beta particles
• gamma rays
• delta rays

Who was the first to correctly describe the photoelectric effect and how photons interact with electrons?

• Bohr
• Einstein
• Newton
• Planck

Who was the first to realize that energy in atoms is quantized and that frequency is related to energy in light?

• Bohr
• Einstein
• Newton
• Planck

Who was the first to realize that the emission spectrum of an element results from its electrons having specific energy possibilities within the atom?

• Bohr
• Einstein
• Newton
• Planck

All of the isotopes of atoms with atomic numbers greater than - - - are radioactive and have not been found to exist in nature.

• 20
• 83
• 92
• 104

Which types of nuclear radiation are similar in size but opposite in charge?

• beta and positron
• alpha and gamma
• alpha and beta
• neutron  and gamma

Which types of nuclear radiation would not be affected by an electromagnetic field?

• beta and positron
• alpha and gamma
• alpha and beta
• neutron  and gamma

Which choice represents the modern idea of the atom?

• An atom is the smallest piece of matter.
• An atom is an artifically assembled unit that contains protons and electrons.
• An atom is the smallest part of an element that has all the properties of the element.
• An atom is a tiny, indivisible particle that can adhere to other atoms but does not change internally.

The absence of chemical activity is associated with an element's having - - - valence electrons.

• 4
• 6
• 8
• 18