Exploring Atomic Structure and Average Atomic Mass

This video tutorial covers the basics of atomic structure, including the composition of atoms, atomic symbols, and atomic mass. It explains the roles of protons, neutrons, and electrons, and introduces the concept of isotopes. The tutorial also demonstrates how to calculate the average atomic mass of isotopes using examples of elements like lithium and magnesium.

What does the atomic number of an element represent?

• The number of protons

• The number of electrons

• The atomic mass

• The number of neutrons

What is the symbol for the element 'mum'?

• Mm

• Mo

• M

• Mu

How is the atomic mass of an element represented?

• Z

• N

• A

• M

What is the mass of one proton in atomic mass units (AMU)?

• 1 AMU

• 0.5 AMU

• 0.1 AMU

• 2 AMU

What is an isotope?

• Atoms with the same number of protons but different number of neutrons

• Atoms with the same number of electrons but different atomic masses

• Atoms with the same atomic mass but different atomic numbers

• Atoms with the same number of neutrons but different number of protons

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

• Atomic number minus atomic mass

• Atomic mass minus atomic number

• Number of protons minus number of electrons

• Number of electrons minus number of protons

Which element has an atomic number of 3?

• Lithium

• Helium

• Hydrogen

• Beryllium

What is the average atomic mass of an element based on?

• The mass of the heaviest isotope

• The mass of the lightest isotope

• The mass of the most common isotope

• The average mass of all naturally occurring isotopes

How do isotopes of the same element differ?

• In their number of neutrons

• In their number of protons

• In their number of electrons

• In their chemical properties

What is the unit used to measure atomic mass?

• Grams

• Kilograms

• Atomic Mass Unit (AMU)

• Milligrams