Nuclear chemistry Flashcards
What is the big letter in the periodic table ?
Symbol
What is the top left hand number?
Atomic mass
Rounded to the nearest number
What is the lower left-hand tell you ?
This is the atomic number and it tells you the number of protons also # of e- in neutral atom
What is an atom?
Smallest building block of matter.
How do I find I find neutrons?
Atomic MASS minus atomic number
MASS
-#
neutrons
Drawing an atom
Protons (P+)and neutrons (N•) inside and electrons (e-) located outside the ring
What is an isotope?
An isotope is an atom/element in which has a different atomic mass. A change in neutrons.
What is an example of an isotope?
Uranium 235 atomic number 92
Uranium 238 atomic number 92
What are the three types of radioactive decay?
Alpha particles, beta particles and gamma rays
What is an alpha particle?
Particle is made up 2p+ and 2n• with a He (helium nucleus) and is positively charged [will decrease]
Stopped by skin
What is a beta particle?
Particle is a negative charge and is stopped by dense material such as clothing.
0
e
-1
What is a GammaRay?
Gamma rays are a pure energy electromagnetic energy and is like strong radioactive material much like light.
What is a proton (P+)
Proton is a positively charged subatomic particle
What is a neutron?
A neutron is a neutral particle that has mass.
What is an e-1
Electron negatively charged subatomic particle located outside a ring.
