Balancing Nuclear Equations: Mass & Atomic Number Confusion

In summary, when balancing a nuclear equation, the sums of the mass numbers and atomic numbers on both sides of the equation must be equal. In this conversation, the confusion arises because the equation given is incomplete and the missing component, an alpha particle, needs to be identified. The equation must be balanced in order for the sums on both sides to be equal.
  • #1
ayans2495
58
2
Homework Statement
A particle is missing from the right-hand side of a nuclear equation. The atomic numbers on the left-hand side of a nuclear equation add to 20. The sum of the atomic numbers on the right-hand side of the equation add to 18. What is the atomic number of the missing particle?
Relevant Equations
That is the question.
I don't understand, in balancing a nuclear equation, the sum of all the mass numbers and atomic numbers, given on the upper left and lower left side of the element symbol, respectively, must be equal for both sides of the equation. So why does the sum on the left side equal to 20, but the sum on the right is equal to 18?
 
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  • #2
The equation given is incomplete : you're supposed to find out what's missing.
 
  • #3
I suppose it's an alpha particle (helium nucleus). Though it was the wording of the question that confused me. It's an equation, the sum on one side must equal the sum on the other side. Or perhaps I just read incorrectly. Thank you for your help.
 

FAQ: Balancing Nuclear Equations: Mass & Atomic Number Confusion

1. What is the purpose of balancing nuclear equations?

The purpose of balancing nuclear equations is to ensure that the number of protons, neutrons, and electrons on both sides of the equation are equal. This is important because nuclear reactions involve changes in the atomic structure of an element, and balancing the equation ensures that the reaction is accurate and follows the laws of conservation of mass and energy.

2. How do you determine the atomic number and mass number in a nuclear equation?

The atomic number can be determined by looking at the element symbol in the equation. The atomic number is the number of protons in the nucleus of an atom, and the element symbol represents a specific element with a unique number of protons. The mass number can be calculated by adding the number of protons and neutrons in the nucleus.

3. What is the difference between mass number and atomic mass?

The mass number is the total number of protons and neutrons in the nucleus of an atom, while the atomic mass is the average mass of all the naturally occurring isotopes of an element. The mass number is a whole number, while the atomic mass is a decimal number.

4. How do you balance a nuclear equation?

To balance a nuclear equation, you must make sure that the number of protons, neutrons, and electrons on both sides of the equation are equal. This can be achieved by adjusting the coefficients in front of the elements or by adding or removing particles from the equation. It is important to note that the number of protons (atomic number) cannot be changed, as this would result in a different element.

5. Why is it important to understand the concept of mass and atomic number in nuclear equations?

Understanding the concept of mass and atomic number in nuclear equations is important because it allows scientists to accurately predict and control nuclear reactions. It also helps to explain the behavior of elements and their isotopes, and plays a crucial role in fields such as nuclear energy and medicine.

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