Hướng dẫn giải Bài 10 (Trang 187 SGK Vật lý 12)

Phản ứng thu năng lượng là phản ứng D.               <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>H</mi><mprescripts/><mn>2</mn><mn>4</mn></mmultiscripts><mi>e</mi><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>N</mi><mprescripts/><mn>7</mn><mn>14</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mn>1</mn><mo>,</mo><mn>1</mn><mi>M</mi><mi>e</mi><mi>V</mi><mo> </mo><munder><mo>→</mo><mrow/></munder><mo> </mo><mmultiscripts><mi>O</mi><mprescripts/><mn>8</mn><mn>17</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>1</mn></mmultiscripts></math> Các phản ứng còn lại là phản ứng tỏa năng lượng: A. <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>1</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>2</mn></mmultiscripts><mo> </mo><munder><mo>→</mo><mrow/></munder><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>2</mn><mn>3</mn></mmultiscripts><mi>e</mi><mo> </mo><mo>+</mo><mo> </mo><mn>23</mn><mo>,</mo><mn>8</mn><mo> </mo><mi>M</mi><mi>e</mi><mi>V</mi></math> B. <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>2</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>2</mn></mmultiscripts><mo> </mo><munder><mo>→</mo><mrow/></munder><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>2</mn><mn>4</mn></mmultiscripts><mi>e</mi><mo> </mo><mo>+</mo><mo> </mo><mn>5</mn><mo>,</mo><mn>4</mn><mo> </mo><mi>M</mi><mi>e</mi><mi>V</mi></math> C. <math xmlns="http://www.w3.org/1998/Math/MathML"><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>2</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>1</mn><mn>3</mn></mmultiscripts><mo> </mo><munder><mo>→</mo><mrow/></munder><mo> </mo><mmultiscripts><mi>H</mi><mprescripts/><mn>2</mn><mn>4</mn></mmultiscripts><mi>e</mi><mo> </mo><mo>+</mo><mo> </mo><mmultiscripts><mi>n</mi><mprescripts/><mn>0</mn><mn>1</mn></mmultiscripts><mo> </mo><mo>+</mo><mo> </mo><mn>17</mn><mo>,</mo><mn>6</mn><mo> </mo><mi>M</mi><mi>e</mi><mi>V</mi><mo>.</mo></math>