Question

53
I
Iodine
126.905

Atomic number
atomic mass
# of protons
# of neutrons
# of electrons

Answer 1

Based on the information provided about iodine (I), here are the details:

- **Atomic number:** 53 (This indicates the number of protons in the nucleus of an iodine atom.)
- **Atomic mass:** 126.905 (This is the weighted average mass of the isotope forms of iodine.)

### Calculations:
1. **# of Protons:**
The atomic number is equal to the number of protons.
- **# of Protons = 53**

2. **# of Electrons:**
In a neutral atom, the number of electrons is equal to the number of protons.
- **# of Electrons = 53**

3. **# of Neurons:**
To find the number of neutrons, we can use the following formula:
\[
\text{# of Neutrons} = \text{Atomic Mass} - \text{# of Protons}
\]
Since atomic mass is often rounded to the nearest whole number for this calculation, we can round 126.905 to 127:
- **# of Neutrons = 127 - 53 = 74**

### Summary:
- **Atomic Number:** 53
- **Atomic Mass:** 126.905
- **# of Protons:** 53
- **# of Neutrons:** 74
- **# of Electrons:** 53

Feel free to ask if you have any more questions!