Pre-Read Isotopes

Isotopes and the Intro to Charged Particles

by Andrew Baldwin

Objectives

• ​Introduce the concept of isotopes

• ​Practice with determining the number of proton, neutrons, and electrons for each element

Poll

What is your confidence level with this topic?

• Confident

• Neutral

• Confused

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

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

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

How many neutrons does the isotope below have?     ⁸⁹ ₃₆Kr

• 53

• 36

• 89

• 125

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

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Poll

How confident are you with this concept?

• Confident

• Neutral

• Confused

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