The nuclear equation is incomplete. Superscript 1 Subscript 1 Baseline H + Superscript 15 Subscript 7 Baseline N yields blank + Superscript 4 Subscript 2 Baseline H e What particle completes the equation? Superscript 12 Subscript 6 Baseline M g Superscript 11 Subscript 5 Baseline B Superscript 11 Subscript 5 Baseline N a Superscript 12 Subscript 6 Baseline C

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.

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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.Mass Number

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 .

Atomic Number

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 .

Symbol

The atomic number of the missing species is . Look up a modern periodic table. The element with atomic number

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