Atomic Structure and Electron Configuration

The video explains the incredibly small size of atoms and their mostly empty structure. It introduces subatomic particles like protons, neutrons, and electrons, and discusses their relative masses and charges. The video demonstrates how to build simple atomic models using mass and atomic numbers, with examples of helium, fluorine, and aluminum atoms. It also covers electron configuration in atomic shells, stopping at calcium. The video concludes with a call to action for viewers to engage with the content.

How small is one picometer in relation to a meter?

• One billionth of a meter

• One quadrillionth of a meter

• One millionth of a meter

• One trillionth of a meter

What is the primary composition of an atom?

• Dense particles

• Liquid core

• Solid matter

• Mostly empty space

What is the relative charge of a neutron?

• Positive

• Variable

• Negative

• Neutral

Why are electrons considered to have negligible mass?

• They are denser than neutrons

• They are larger than protons

• They are much smaller than protons and neutrons

• They have the same mass as protons

What does the atomic number of an element represent?

• The number of neutrons

• The number of protons

• The number of electrons

• The total mass of the atom

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

• Atomic number minus mass number

• Mass number minus atomic number

• Number of protons plus electrons

• Number of electrons minus protons

How many electrons can the first shell of an atom hold?

• Six

• Four

• Two

• Eight

What is the mass number of a helium atom?

• Two

• Four

• Six

• Eight

How many electrons does a fluorine atom have in its second shell?

• Eight

• Seven

• Five

• Six

What is the electron configuration pattern up to element 20?

• 2, 10, 10, 2

• 2, 6, 6, 2

• 2, 4, 4, 2

• 2, 8, 8, 2