# If an element x of atomic number z and mass number y is…

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**If an element x of atomic number z and mass number y is irradiated by an intense concentration of neutrons, the relevant nuclear equation is…**

**QUICK ANSWER…**

**B**

**SOLUTION… **** **

**For a balanced nuclear equation, the total mass number of reactants must equal that of products, and the total atomic number of all reactants must also equal that of products.**

**Total mass number of all reactants = Total mass number of products**

**For this question, we do not have problems with the reactants, as all the options feature the same reactants, the differences come from the products. Using the concept of equality of atomic and mass numbers of both sides, we have:**

**Total mass number of reactants = y + 1 = Total mass number of product**

**Total atomic number of reactants = z + 0 = z = Total atomic number of product**

**Option B**

**Now for the right answer to the above question:**

**Option A is incorrect.****Option B is correct.****C is incorrect.****D is not the correct answer.**

**KEY-POINTS…**

**You may please note these/this:**

**For a balanced nuclear reaction equation, the total mass number of reactant(s) must be accounted for in the product side.****Also, the total atomic number of reactant(s) equals that of product(s).**

**Use the questions and answers session to raise further questions and deal more on this topic…**

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**/ culled from 2017 JAMB-UTME Chemistry question 5 /**

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