Boron Atomic Structure and Isotopes

The video tutorial explains the atomic structure of boron, focusing on protons, neutrons, and electrons. It discusses the concept of isotopes, particularly boron-10 and boron-11, and how to calculate the number of neutrons and mass number. The video also covers the average atomic mass of boron and introduces nuclear notation for representing isotopes.

What is the atomic number of boron?

• 7

• 5

• 3

• 9

In a neutral boron atom, how many electrons are present?

• 5

• 3

• 7

• 9

What is the mass number of the most common isotope of boron?

• 13

• 12

• 11

• 10

How many neutrons are present in boron-11?

• 4

• 7

• 5

• 6

What percentage of boron atoms are boron-11?

• 80%

• 60%

• 50%

• 70%

What is the mass number of boron-10?

• 8

• 9

• 10

• 11

What is the average atomic mass of boron as seen on the periodic table?

• 10.01

• 10.81

• 11.01

• 11.81

In nuclear notation, what number is placed at the bottom for boron?

• 9

• 7

• 5

• 3

Which of the following is a correct representation of boron-11 in nuclear notation?

• 10B11

• 11B10

• 5B11

• 11B5

What is the significance of the mass number in isotopes?

• It determines the charge of the atom.

• It indicates the number of protons.

• It represents the total number of protons and neutrons.

• It shows the number of electrons.