53

Question

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!