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makayladurham19
20.09.2019 •
Chemistry
Describe transverse waves in your own !
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Ответ:
The missing nucleus is carbon-12:
Explanation:
The nuclear reaction given is:
To balance this equation you must add a nucleus which contains the missing mass and atomic numbers.
Mass number is the number of protons plus neutrons and is the superscript to the left of the chemical symbol: 249 for Cf, 257 for Rf, and 1 for n (neutron).
Atomic number is the number of protons and is the subscript to the left of the chemical symbol: 98 for Cf, 104 for RF and 0 for n.
Thus, the balance is:
Mass number:
249 + A = 257 + 4 × 1249 + A = 257 + 4249 + A = 261A = 261 - 249A = 12Atomic number:
98 + Z = 104 + 4×098 + Z = 104Z = 104 - 98Z = 6Then, you are looking for a nucleus (or gropu of nuclei) which supply 6 protons and 6 neutrons. That is a nucleus of carbon-12:
.
The balanced nuclear reaction is: