Answered

From everyday questions to specialized queries, IDNLearn.com has the answers. Join our community to receive timely and reliable responses to your questions from knowledgeable professionals.

Na-23 has 11 protons. How many neutrons does it have?

A. 11
B. 12
C. 23
D. 34

Sagot :

GinnyAnsweridn
Sure, let's solve this step-by-step.

1. Identify the given information:
- We are dealing with Na-23.
- Na-23 has 11 protons.

2. Understand the mass number:
- The mass number (denoted as [tex]\( A \)[/tex]) of an isotope is the total number of protons and neutrons in the nucleus. For Na-23, the mass number is 23.

3. Recall the relationship between mass number, protons, and neutrons:
- The mass number [tex]\( A \)[/tex] is the sum of the number of protons [tex]\( Z \)[/tex] and the number of neutrons [tex]\( N \)[/tex].
- Mathematically, this can be expressed as:
[tex]\[ A = Z + N \][/tex]

4. Substitute the known values into the equation:
- Here, [tex]\( A = 23 \)[/tex] and [tex]\( Z = 11 \)[/tex].

5. Solve for the number of neutrons [tex]\( N \)[/tex]:
[tex]\[ N = A - Z \][/tex]
Substituting the values:
[tex]\[ N = 23 - 11 \][/tex]

6. Calculate the result:
[tex]\[ N = 12 \][/tex]

Therefore, the number of neutrons in Na-23 is 12.

The correct answer is:
B. 12
We value your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Your search for solutions ends at IDNLearn.com. Thank you for visiting, and we look forward to helping you again.