Isotopes Example

The video tutorial explains isotopes using chlorine and lithium as examples. It describes how isotopes have the same number of protons but different numbers of neutrons. The tutorial demonstrates calculating the number of neutrons in chlorine isotopes using the mass number and atomic number. It also covers lithium isotopes, showing how to determine their mass numbers.

What is the defining characteristic of isotopes?

• Same number of protons and neutrons

• Different number of protons and neutrons

• Same number of protons, different neutrons

• Same number of neutrons, different protons

How many neutrons does chlorine-35 have?

• 17

• 18

• 19

• 20

What is the mass number of chlorine-37?

• 36

• 37

• 35

• 38

How many protons are present in lithium?

• 1

• 2

• 3

• 4

What is the mass number of the lithium isotope with 4 neutrons?

• 9

• 7

• 8

• 6