chem help plz?

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which isotope, when is bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons?

1. nobelium-245
2. radium-259
3. californium-245
4. nobelium-249
5. californium-249

2007-12-09 07:03:47 · 1 answers · asked by Daone 1 in Science & Mathematics ➔ Chemistry

1 answers

5.) 98Cf249 + 8O18 ===> 106Sg263 + 4n

263 + 4 = 267. Of the 267 total mass of products, 18 comes from O. 267 - 18 = 249. All 8 protons of O stayed with the Sg nucleus, so the atomic number of the starting material must have been 106 - 8 = 98.

2007-12-09 07:14:06 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋