Vocab
Vocab
Vocab
Vocab
Vocab
100
Matter is composed of empty space through which atoms
What is Democitus's idea
100
Radiation traveling from the cathode to the anode within the tube
What is a Cathode ray
100
number of protons in an atom
What is the Atomic Number
100
unstable nuclei lose energy by emitting radiation in a spontaneous process
What is radioactive decay
100
high energy radiation that possess no mass
What are gamma rays
200
Smallest particle of an element that retains the properties of the element
What is an atom
200
Positively charged subatomic particle
What is a Proton
200
1/12 of a carbon-12 atom
What is the Atomic Mass Unit
200
emitting an alpha particle from the nucleus of an atom
What is alpha radiation
200
2 protons and 2 neutrons
What is an alpha particle
300
Positively charged center core of an atom
Who is the nucleus
300
Subatomic with no charge
What are neutrons
300
reactions which involve a change in an atom’s nucleus
What are nuclear reactions
300
shows atomic number and mass number for all particles
What is the nuclear equation
300
protons + neutrons
What is the mass number
400
Negative charge
What is an electron
400
Protons and neutrons together
What are nucleons
400
spontaneous emission of radiation
What is radioactivity
400
emission of a beta particle from a nucleus
What is beta radiation
400
The mass of an atom
What is the atomic mass
500
All matter is composed of extremely small particles called atoms
Who is John Dalton
500
Atoms with the same number of protons, but a different number of neutrons
What are Isotopes
500
rays and particles emitted by radioactive substances
What is radiation
500
fast moving electron from the nucleus
What is a beta particle
500
Scientist that found the center of an atom and named it the nucleus
Who is Ernest Rutherford
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