Isotopes
Isotopes are atoms of the same element that vary in the number of these subatomic particles
neutrons
Who was the scientist that named and discovered Polonium
Marie Curie
Spontaneous emission of energy and/or particles is known as what?
Radioactivity
What is the charge of a beta particle?
-1
The actual rays and particles that are emitted by radioactive material is called what?
radiation
Which isotope would have a higher atomic mass (amu)? Uranium-236 or Uranium-238.
Uranium-238
What were the 3 types of radiation that Rutherford discovered?
Alpha, Beta, and Gamma radiation
A change in an atoms nucleus is known as what kind of reaction?
Nuclear reaction
What happens during beta plus decay?
a proton is turned into a neutron and a positron
2+
What is the mass number of an isotope that has 12 protons and 14 neutrons?
26
Who was the scientist that discovered the nucleus of an atom by shooting alpha particles at a gold foil?
Rutherford
Why do nuclei become radioactive?
Unstable energy in their nucleus
What type of radioactive decay has to occur for Carbon-11 to become Boron-11?
Beta plus
Which type of radiation has the most mass?
Alpha radiation
How many neutrons does Polonium-209 have?
125
Where was the location of documentary we watched in class called Three Mile Island?
Middletown Pennsylvania
Carbon-14 undergoes 1 round of beta minus radiation, what are the products of this nuclear reaction?
Nitrogen-14 + e-
The name of a particle that is antimatter with a positive charge
positron
What are the products of a nuclear reaction where Cobalt-60 undergoes 1 round of beta minus decay?
Nickle-60 + e-
What is the identity of an isotope with a mass number of 226 that has 138 neutrons?
Radium
Name one thing from our research we did at the beginning of this section about radioactivity that is helpful to humans.
Power, agriculture, etc.
Uranium-238 undergoes alpha radiation and 2 rounds of gamma radiation. What are the products of this nuclear reaction?
An alpha particle (Helium-4 nucleus) + Thorium-234 +2 gamma rays
Which type of radiation is the only type that cannot produce a new atom?
Gamma radiation
Which type of radioactive decay occurred in a nuclear reaction where Americium-241 becomes Neptunium-237?
Alpha decay