Question

key
3
192
193
1
189 190 191
182 183 184 185 186 187 188
No
2
1
1
2
3
2
1
1
3
4
21
196 197 198 199 200 201 202 203 204 205 206 207 208
SI
No
Rey
1
1
2
3
3
1
3
3
1
1
1
211 212 213 214 215 216 217
Na.
Key
1
1
3
2
3
3
4 B (4 8.12 16,20]
D=15. 10. 15, 20)
2= 12.4.6 8 10 12 14 167
Find (B-c) ne-o)
Mathematics
248​

Answer 1

Answer:

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Step-by-step explanation:

Gold (79Au) has one stable isotope, 197Au, and 36 radioisotopes, with 195Au being the most stable with a half-life of 186 days. Gold is currently considered the heaviest monoisotopic element (bismuth formerly held that distinction in the belief that the isotope, bismuth-209, was stable; however it is now known to be slightly radioactive).