Isotope Lesson

Isotopes Lesson

​Objectives

​Read through the slides to be able to answer the following questions.

By the end of the lesson, students will be able to explain how the atomic structure of isotopes are similar and different from one another.

ISOTOPES

Atoms with the same number of protons and a

different number of neutrons

Multiple Choice

What is the main difference between the Hydrogen atoms shown in the picture?

• The number of protons

• The number of neutrons

• The electron shell

• There is no difference between the atoms of Hydrogen

Fill in the Blanks

What stays the same in isotopes ?

Fill in the Blanks

What is different in isotopes?

Multiple Choice

An isotope is an atom of the same element that has a different number of _____.

• protons

• neutrons

• electrons

Multiple Choice

The biggest difference between isotopes of the same element are the masses.

• False

• True

Multiple Choice

An isotope of an element will react the same as a different isotope of the same element.

• true

• false

Multiple Choice

Carbon has an atomic number of 6. Which isotope has 8 neutrons?

• Carbon-12 or C-12

• Carbon-13 or C-13

• Carbon-14 or C-14

Multiple Choice

Lithium has 3 isotopes, which isotope has 4 neutrons?

• Lithium-6 or Li-6

• Lithium-7 or Li-7

• Lithium-8 or Li-8

ISOTOPE NOTATION:

Multiple Choice

What does the 14 represent in the isotope notation?

• atomic number

• protons

• electrons

• Mass Number

Labeling

Label the Isotope Notation correctly

Drag labels to their correct position on the image

mass number

atomic number

symbol

Fill in the Blanks

How many protons does Li have?

Fill in the Blanks

How many electrons does Li

Fill in the Blanks

How many neutrons does Li have

Multiple Choice

How many protons are in a Chlorine atom? (Mass number = 35)

• 17

• 35

• 35.45

• 18

Multiple Choice

How many neutrons are in a Phosphorus atom? (Mass Number = 31)

• 15

• 30.9738

• 16

• 31

​Reading the Symbol

• ​Note: This is not reflective of the Periodic table Organization.

• ​Mass Number provided at the top and atomic number sometimes at the bottom.

  • ​The only change should be the top number.

​Anything else?

• ​Sometimes it is given in Hyphen notation.

  • ​Element symbol or name hyphen (dash) Mass Number.

Multiple Choice

In a correctly written symbol what would be located in the "A" position?

• number of neutrons

• atomic number

• number of electrons 

• mass number

Multiple Choice

What quantities vary between isotopes of an element?

• protons, electrons, and atomic mass

• protons, electrons, and atomic number

• neutrons and electrons

• neutrons and atomic mass

Multiple Choice

What do these isotopes of carbon all have in common?

• neutrons & mass number

• atomic number and neutrons

• atomic number and electrons

• protons, atomic number, and mass number

Multiple Choice

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Multiple Choice

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

• n⁰ ;  atomic #’s

• p⁺ ; atomic #’s

• e^- ; atomic masses

• n⁰ ; atomic masses

Multiple Choice

If X is the symbol for an element, which of the following two symbols represent isotopes of the same element?  

• I and II

• III and IV

• I and IV

• I and III