CHEM 1305 Lecture Notes - Lecture 20: Atomic Nucleus, Subatomic Particle, Radio Wave
26 Oct 2016
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Need extra neutrons to hold the larger growing nucleus together. C opper, c u, has an atomic mas s of 63. 546. B y the math, you would multiply the mas s number by the fraction (e. g. 31% = 0. 31) for each is otope and then add the products tog ether to arrive at an atomic mas s . Y ou s hould als o be able to make an educated gues s noting that 63. 546 is a bit les s than exactly in between 63. 000 and 65. 000, which means that the. C u-63 is otope is more abundant than the c u-65 is otope. T he s trong nuclear force weakens over the dis tance of the diameter of a large atomic nucleus . T his means that protons on oppos ite s ides are no longer s o attracted to each other (by the s trong nuc lear force).
