35

Question

Br
Bromine
79.904

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

Answer 1

For bromine (Br), here are the requested details:

• Atomic number: 35

• Atomic mass: 79.904

• Number of protons: 35 (the atomic number corresponds to the number of protons)

• Number of electrons: 35 (in a neutral atom, the number of electrons equals the number of protons)

• Number of neutrons: To calculate the number of neutrons, subtract the atomic number from the atomic mass (rounded to the nearest whole number).

  \[ \text{Number of neutrons} = \text{Atomic mass} - \text{Atomic number} = 79.904 - 35 \approx 45 \]

So, the final breakdown is:

• Number of neutrons: 44 or 45 (usually rounded to 45 using the atomic mass of 79.904)

Here is the complete summary:

• Atomic number: 35
• Atomic mass: 79.904
• Number of protons: 35
• Number of neutrons: 45
• Number of electrons: 35