Calculate the number of protons, electrons, neutrons in Bromine with atomic number 35 and mass number 80.

To determine the number of protons, electrons, and neutrons in Bromine (Br) with an atomic number of 35 and a mass number of 80, we can follow a straightforward process based on the definitions of these subatomic particles.

Understanding Atomic Structure

Every element is defined by its atomic number, which indicates the number of protons in its nucleus. For Bromine, the atomic number is 35. This means that Bromine has 35 protons. In a neutral atom, the number of electrons is equal to the number of protons, so Bromine also has 35 electrons.

Calculating Neutrons

The mass number of an atom is the total count of protons and neutrons in the nucleus. In this case, the mass number of Bromine is given as 80. To find the number of neutrons, we can use the following formula:

• Mass Number = Number of Protons + Number of Neutrons

Rearranging this formula to solve for neutrons gives us:

• Number of Neutrons = Mass Number - Number of Protons

Substituting the known values:

• Number of Neutrons = 80 - 35
• Number of Neutrons = 45

Summary of Subatomic Particles in Bromine

Now that we have performed the calculations, we can summarize the findings:

• Protons: 35
• Electrons: 35
• Neutrons: 45

In conclusion, Bromine with an atomic number of 35 and a mass number of 80 contains 35 protons, 35 electrons, and 45 neutrons. This understanding of atomic structure is fundamental in chemistry, as it helps explain the behavior and properties of elements.