Isotopes
The average mass of an element taken from all of its isotopes and their abundances is called this.
What is the Atomic Mass, or Average Atomic Mass?
This leftover effect is the largest piece of evidence in support of the Big Bang Theory.
What is Cosmic Background Radiation?
This term is used to describe the amount of time that it takes for one half of all of the nuclei in a sample of a certain isotope to decay.
What is a half-life?
In 1908, this man and his colleagues conducted an experiment involving a thin gold foil and some alpha particles.
Who is Rutherford?
This negatively charged particle can be found spinning around the outskirts of the atom. How lonely!
What is the electron?
Daily Double: The mass of one specific atom of an element is called this.
What is the Atomic Mass Number?
This number is approximately equal to the number of years since the Big Bang occurred, creating the universe as we know it.
What is 14 Billion?
A radioactive isotope is one where particles randomly exit the atom in a sometimes violent fashion. The opposite of a radioactive isotope is this type of isotope.
What is a stable isotope?
The Gold Foil experiment lead to the discovery of this atomic model.
What is the nuclear model?
Protons and neutrons can be found in this dense place at the center of the atom, which is about 20,000 times smaller than the atom as a whole.
What is the Nucleus?
Neon-21 has this many neutrons.
What is 11?
Larger Stars, in the classes of Giant and Supergiant, can create any element up to Iron which possesses this atomic number.
What is 26?
Daily Double: Beta Rays are made up of these subatomic particles.
What are electrons?
J.J. Thompson was able to figure out this property of an electron because of how quickly and strongly it responded to magnetic fields.
What is size? (Also acceptable: What is negative charge?)
Daily Double: The charge of a proton or electron (1.6*10^-19) is represented by this lowercase letter.
What is e?
Xe-131 has this atomic number.
What is 54?
Any element larger than Iron can only be naturally created by this cataclysmic event.
What is a supernova?
If I have 800g of an isotope with a half life of 10 minutes, I would have this much after 30 minutes.
What is 100g?
In 1913, This scientist discovered the magnitude of an electron's charge (e) using oil droplets and a positively charged plate.
Who is Millikan?
Because it is impossible to tell where an electron is at any given time, scientists describe the space surrounding the nucleus with this meteorological name.
What is the electron cloud?
Boron has two isotopes: B-10, with an abundance of 19.9%, and B-11, with an abundance of 80.1%. Based upon this information, the average atomic mass for Boron is this number.
10.801
Small Stars, like Earth's sun, are capable of turning Hydrogen into Helium through this process, which uses heat and pressure to create larger elements from smaller ones.
What is Nuclear Fusion?
This type of radioactive ray is made up of neutral charge high energy light waves, and can only be stopped by several meters of lead (Pb).
What are Gamma Rays?
In 1897, J.J. Thompson discovered the electron using a glass tube and this type of negatively charged beam.
What is a cathode ray?
This word describes multiple atoms of the same element which have different mass numbers.
Bonus points if you can tell me why!
What are isotopes?