Understanding Isotopes and Atomic Structure

The video tutorial explains isotope notation, focusing on aluminum. It introduces the concept of isotope or nuclear notation, detailing how to write it using the element symbol, mass number, and atomic number. The tutorial highlights aluminum 27 as the most common isotope, explaining its mass number and atomic number. It also covers the neutrality of elements on the periodic table, noting that aluminum has no ionic charge. The video demonstrates writing isotope notation for aluminum 26 and explains how to calculate the number of neutrons in isotopes.

What is another name for isotope notation?

• Periodic notation

• Elemental notation

• Nuclear notation

• Atomic notation

In isotope notation, where is the mass number placed?

• Above the element symbol

• Next to the element symbol

• To the right of the element symbol

• Below the element symbol

Why is aluminum-27 the most common isotope of aluminum?

• Its average atomic mass is closest to the natural abundance

• It is the most stable isotope

• It has the lowest mass number

• It has the highest atomic number

What is the atomic number of aluminum?

• 14

• 15

• 13

• 12

What charge do elements on the periodic table typically have?

• Positive

• Negative

• Neutral

• Variable

How many protons does aluminum-26 have?

• 12

• 13

• 14

• 15

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

• Divide the mass number by the atomic number

• Subtract the atomic number from the mass number

• Add the atomic number to the mass number

• Multiply the atomic number by the mass number

What is the mass number of aluminum-26?

• 27

• 25

• 28

• 26

If an isotope has 13 protons and a mass number of 27, how many neutrons does it have?

• 13

• 15

• 14

• 12

What is the charge of aluminum-26 in isotope notation?

• 0

• -1

• +1

• +2