Understanding Atoms and the Periodic Table

Professor Bill Tyson introduces the concept of atoms, explaining that they are the smallest part of a chemical element. He discusses atomic numbers, using Hydrogen and Oxygen as examples, and explains the organization of elements in the periodic table. The video concludes with a brief history of the periodic table's development and a call to action for viewers to engage with the channel.

What is the smallest part of a chemical element?

• Molecule

• Atom

• Electron

• Proton

What determines the atomic number of an element?

• Number of protons

• Number of neutrons

• Number of electrons

• Number of atoms

How many protons does a Hydrogen atom have?

• Four

• Three

• Two

• One

What is the atomic number of Oxygen?

• Six

• Seven

• Eight

• Nine

What is the simplest element with only one proton and one electron?

• Helium

• Hydrogen

• Lithium

• Carbon

How many elements are currently known and organized in the Periodic Table?

• 108

• 118

• 138

• 128

Who organized the elements according to their atomic number in 1869?

• Albert Einstein

• Henry Moseley

• Marie Curie

• Dmitri Mendeleev

In which year did Henry Moseley propose changes to the Periodic Table?

• 1933

• 1913

• 1923

• 1903

What is the main purpose of the Periodic Table?

• To categorize elements by their color

• To list elements alphabetically

• To organize elements by their atomic number

• To organize elements by their atomic mass