Top network posts

• 20 Why doesn't orbital electron fall into the nucleus of Rb85, but falls into the nucleus of Rb83?
• 16 Having the same number of neutrons
• 16 Rotate a long bar in space and get close to (or even beyond) the speed of light $c$
• 13 Why some nuclei with "magic" numbers of neutrons have a half-life less than their neighbor isotopes?
• 11 What is the escape velocity of a Black Hole?
• 10 Old Russian Physics Papers?
• 9 Why is beta negative decay more common than beta positive?
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