Atoms and the Periodic Table

Mr. Andersen explains the structure of atoms, focusing on protons, neutrons, and electrons. He discusses how the periodic table is organized by atomic numbers and the significance of mass numbers. The video covers electron configurations, energy levels, and the concept of valence electrons, which determine chemical reactivity. Examples of elements like neon, nitrogen, and lithium illustrate these concepts. The video concludes with a discussion on chemical bonds and the periodic table's organization, highlighting the relationships between elements.

What are the three main subatomic particles mentioned in the text?

How is the periodic table organized according to the text?

What does the atomic number tell us about an element?

Explain the significance of the mass number in relation to protons and neutrons.

What is the electron configuration for neon as described in the text?

How do nitrogen and hydrogen interact to form ammonia?

What are the properties of alkali metals as mentioned in the text?