Copper and Its Isotopes

This video tutorial explains how to determine the number of protons, neutrons, and electrons in copper, focusing on its two major isotopes, copper-63 and copper-65. It begins by identifying copper's atomic number as 29, which indicates the number of protons and electrons in a neutral atom. The video then explains how to calculate the number of neutrons using the mass number, which is the sum of protons and neutrons. The tutorial also discusses the abundance of copper isotopes and how to calculate the average atomic mass. The video concludes with a summary of copper's atomic structure.

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

• Number of protons

• Number of electrons

• Number of neutrons

• Atomic number

What is the atomic number of copper?

• 30

• 29

• 31

• 28

If copper is neutral, how many electrons does it have?

• 31

• 30

• 29

• 28

Copper-63 has a mass number of 63. How many neutrons does it have?

• 29

• 37

• 36

• 34

Copper-65 has a mass number of 65. How many neutrons does it have?

• 36

• 29

• 34

• 37

What percentage of a typical copper sample is copper-63?

• 72%

• 28%

• 17%

• 83%

What is the average atomic mass of copper based on its isotopes?

• 63.00

• 65.00

• 63.55

• 64.00

Why is it not recommended to round the average atomic mass of copper?

• Because it is a whole number

• Because it is close to the middle of two isotopes

• Because it is exactly 65

• Because it is exactly 63

What is the sum of protons and neutrons in an atom called?

• Atomic number

• Mass number

• Isotope number

• Electron number

What is the identity of an element determined by?

• Atomic number

• Number of electrons

• Mass number

• Number of neutrons