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Most elements exist in multiple forms called these; beyond No. 83 on the periodic table, there are no stable ones |
isotope
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$1,600 |
DJ |
TIME FOR SCIENCE |
2024-07-23 |
#9152 |
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Dr. Margaret Todd gave science this word for different forms of one basic substance; it's from the Greek for "equal" & "place" |
isotope
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FJ |
WOMEN & SCIENCE |
2021-01-08 |
#8310 |
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This form of an element has the same number of protons but a different number of neutrons |
isotope
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$400 |
DJ |
SCIENCE |
1990-02-05 |
#1256 |
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It's defined as a form of an element with the same atomic number but different atomic weight |
Isotope
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$300 |
J |
PHYSICAL SCIENCE |
1988-11-17 |
#969 |