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The atomic number of an element is determined by the number of these in one atom of it |
protons
|
$400 |
DJ |
SCIENCE |
2022-01-04 |
#8547 |
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(Jimmy of the Clue Crew, at Harvard University's Historical Scientific Instruments, shows a console.) From 1947 to 2002, this control console was at the Harvard cyclotron lab for pioneering research now used to treat cancer; the surrounding healthy tissue is relatively undamaged, but the cancer cells are destroyed by irradiation with these positive particles |
protons
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$800 |
J |
INSTRUMENTAL IN SCIENCE |
2015-03-31 |
#7037 |
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Mass number is defined as the number of neutrons & these particles in an atom's nucleus |
protons
|
$800 |
DJ |
SCIENCE |
2008-07-04 |
#5500 |
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(Kelly of the Clue Crew rubs a balloon on her hair in the Jeopardy!science lab.) Rubbing a balloon builds up electrons that then attract this type of particle in ametal can, from the Greek for "first" |
protons
|
$1,600 |
DJ |
SCIENCE |
2008-01-10 |
#5374 |
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These particles studied by astroparticle physics are the only ones in the nuclei of hydrogen atoms |
protons
DD
|
$2,600 |
DJ |
CUTTING-EDGE SCIENCE |
2007-05-07 |
#5226 |
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Mass number is defined as the number of neutrons & these particles in an atom's nucleus |
Protons
|
$600 |
DJ |
SCIENCE |
1999-04-01 |
#3364 |
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The cyclotron Ernest Lawrence invented in 1932 was designed to accelerate these particles |
protons
|
$1,000 |
DJ |
PHYSICAL SCIENCE |
1990-02-12 |
#1261 |