4. Without the sun, there would be no way to replace energy released into the environment. True or False
1 answer:
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Answer:
The missing species is carbon-12 .
The nuclear equation should be .
Explanation:
Let represent the mass number of the missing species, and let
represent its atomic number.
.
For this question, there are three things to consider:
- The sum of the mass numbers should be conserved.
- Since there's no beta particle (
or
) involved, the sum of the atomic numbers should also be conserved.
- The atomic number of the missing species should correspond to atomic symbol.
The sum of the mass numbers on the left-hand side of this reaction is: .
The sum of the mass number on the right-hand side (including that of the missing species) is .
These two numbers should be the same. In other words, . Therefore, the mass number of the missing species would be
.
The sum of the atomic numbers on the left-hand side of this reaction is: .
The sum of the mass number on the right-hand side (including that of the missing species) is .
These two numbers should be the same. In other words, . Therefore, the mass number of the missing species would be
.
The atomic number of the missing species is
. Look up a modern periodic table. The element with atomic number