Electron Configurations and Atomic Structure

This video tutorial by Mr. W is the second part of a series on basic chemistry for biology students. It covers the structure of atoms, focusing on the nucleus and electron organization. The octet rule is introduced, explaining how electrons fill orbitals. The video provides examples of electron configurations for elements like hydrogen, helium, carbon, nitrogen, sodium, sulfur, calcium, and potassium. It emphasizes the importance of understanding these concepts for chemical bonding and molecular structure. The tutorial encourages practice through exercises available on the Science Music Videos website.

What are the components of an atom's nucleus?

• Protons and electrons

• Electrons only

• Protons and neutrons

• Neutrons and electrons

What is the maximum number of electrons the first orbital can hold according to the octet rule?

• Six

• Eight

• Two

• Four

How many electrons does helium have in its first orbital?

• One

• Two

• Three

• Four

How many electrons are in the second orbital of a carbon atom?

• Four

• Two

• Eight

• Six

How many electrons does nitrogen have in its second orbital?

• Eight

• Seven

• Five

• Three

What is the electron configuration of sodium in its third orbital?

• Four electrons

• Three electrons

• Two electrons

• One electron

How many electrons are in the third orbital of sulfur?

• Ten

• Eight

• Six

• Four

Which element's electron configuration challenges the octet rule?

• Potassium

• Hydrogen

• Sulfur

• Helium

How many electrons does oxygen have in its second shell?

• Four

• Six

• Eight

• Ten

What is the electron configuration of phosphorus in its third orbital?

• Three electrons

• Four electrons

• Five electrons

• Six electrons