Beryllium Isotopes and Atomic Structure

This video tutorial explains the atomic structure of beryllium, focusing on its protons, neutrons, and electrons. It discusses the concept of isotopes, particularly beryllium-9 and beryllium-10, and how to calculate the number of neutrons. The video also covers nuclear notation, showing how to represent isotopes with atomic and mass numbers. The tutorial emphasizes that the atomic number of beryllium is always four, regardless of the isotope, and explains the difference between neutral elements and ions.

What is the atomic number of beryllium?

• 8

• 2

• 4

• 6

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

• 4

• 3

• 5

• 2

What is the significance of the atomic number in an element?

• It determines the average atomic mass

• It determines the number of neutrons

• It determines the number of electrons in a neutral atom

• It determines the mass number

How do you calculate the number of neutrons in an isotope?

• Divide the mass number by the atomic number

• Multiply the atomic number by the mass number

• Add the atomic number to the mass number

• Subtract the atomic number from the mass number

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

• 7

• 10

• 8

• 9

Which of the following is true about isotopes?

• They have different numbers of protons

• They have different numbers of neutrons

• They have different numbers of electrons

• They have different atomic numbers

What is the mass number of beryllium-10?

• 9

• 11

• 8

• 10

Which isotope of beryllium has 5 neutrons?

• Beryllium-8

• Beryllium-9

• Beryllium-7

• Beryllium-10

What does nuclear notation represent?

• The chemical symbol and average atomic mass

• The chemical symbol and atomic number

• The atomic number and mass number

• The mass number and average atomic mass

How is the average atomic mass different from the mass number?

• Average atomic mass is a whole number

• Average atomic mass is a weighted average

• Mass number is a weighted average

• Mass number is a decimal