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Which of the following is true about Tin?

A. It has 69 neutrons and 50 protons.
B. It has 69 neutrons and 49 protons.
C. It has 69 neutrons and 50 electrons.
D. Both A and C are true.

Answer :

Sure, let's examine the question step by step.

Firstly, let's break down what the question is asking about Tin (which has the chemical symbol Sn):
1. Protons: The number of protons defines the element. Tin has an atomic number of 50, which means Tin has 50 protons.
2. Neutrons: To determine the number of neutrons in a specific isotope, you subtract the number of protons from the mass number of that isotope.

Now let’s refer to the provided data:
- Tin is specified as having 69 neutrons.
- Tin has 50 protons, as determined by its atomic number.

Based on the above information, let's verify each option given in the question:

### Option A:
- 69 neutrons and 50 protons.
- This matches our data: Tin does have 50 protons and an isotope of Tin has 69 neutrons.

### Option B:
- 69 neutrons and 49 protons.
- This is incorrect because Tin must have 50 protons, as its atomic number is 50.

### Option C:
- 69 neutrons and 50 electrons.
- For a neutral atom, the number of electrons equals the number of protons. Since Tin has 50 protons, it would indeed have 50 electrons in its neutral state. This matches our data.

### Option D:
- Both A and C are True.
- From our analysis, both A and C are indeed true.

Given the verification of each option, the correct answer is:

D. Both A and C are True.

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