Understanding Isotopes and Atomic Structure

The video tutorial explains how to identify an element based on its atomic number, focusing on sodium, which has 11 protons. It describes the periodic table's role in determining atomic numbers and highlights that sodium typically has 12 neutrons but can vary, leading to isotopes. The tutorial concludes with a brief mention of isotopes and a link for further learning.

What does the atomic number of an element represent?

• The atomic mass

• The number of protons

• The number of electrons

• The number of neutrons

How can you identify an element on the periodic table?

• By its atomic number

• By its color

• By its atomic mass

• By its position in the table

What is the atomic number of sodium?

• 10

• 13

• 12

• 11

Which element has 11 protons?

• Magnesium

• Sodium

• Aluminum

• Potassium

What are isotopes?

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

• Atoms with different atomic numbers

• Atoms with the same atomic mass

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

How many neutrons does the most common isotope of sodium have?

• 13

• 12

• 11

• 10