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Sagot :
Answer:
To analyze the chlorine (Cl) isotope, we need to look at the atomic number, atomic mass, and the number of protons, electrons, and neutrons.
Given:
- Atomic number of Cl (Z) = 17
- Atomic mass of Cl = 35.45
### Mass Number:
The mass number (A) is the sum of protons and neutrons in the nucleus. Since atomic mass is often given as a decimal due to the presence of isotopes, we round it to the nearest whole number for mass number calculations.
\[ \text{Mass Number (A)} \approx 35.45 \approx 35 \]
### Protons:
The number of protons is equal to the atomic number.
\[ \text{Number of protons} = 17 \]
### Electrons:
For a neutral atom, the number of electrons equals the number of protons.
\[ \text{Number of electrons} = 17 \]
### Neutrons:
The number of neutrons is found by subtracting the atomic number from the mass number.
\[ \text{Number of neutrons} = \text{Mass Number (A)} - \text{Atomic Number (Z)} \]
\[ \text{Number of neutrons} = 35 - 17 = 18 \]
So, for Cl:
- **Mass Number (A)**: 35
- **Protons**: 17
- **Electrons**: 17
- **Neutrons**: 18
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