Bromine Atomic Structure and Isotopes

This video tutorial explains how to determine the number of protons, neutrons, electrons, and the mass number for bromine, focusing on its two major isotopes, bromine-79 and bromine-81. It covers the atomic number, which equals the number of protons, and explains that in neutral elements, the number of protons equals the number of electrons. The video also demonstrates how to calculate the number of neutrons and the mass number, and how to find the average atomic mass based on the abundance of isotopes.

What is the primary difference between isotopes of the same element?

• Atomic number

• Number of electrons

• Number of protons

• Number of neutrons

What is the atomic number of Bromine?

• 34

• 37

• 35

• 36

How many protons does Bromine have?

• 33

• 34

• 35

• 36

In a neutral atom, the number of protons is equal to the number of what?

• Neutrons

• Electrons

• Isotopes

• Mass number

How many electrons does a neutral Bromine atom have?

• 36

• 35

• 34

• 33

What is the mass number of Bromine-79?

• 78

• 79

• 80

• 81

How many neutrons are in Bromine-81?

• 46

• 45

• 47

• 44

What percentage of Bromine isotopes is Bromine-79?

• 52%

• 51%

• 50%

• 49%

What is the average atomic mass of Bromine?

• 78.90

• 81.90

• 80.90

• 79.90

Why is the average atomic mass of Bromine close to 79.90?

• Because of the presence of other isotopes

• Because both isotopes are equally abundant

• Because Bromine-81 is more abundant

• Because Bromine-79 is more abundant