Atomic Structure and Electron Configuration

The video tutorial explains the composition of atoms, focusing on protons, electrons, and neutrons. It details how to determine the number of protons and electrons in potassium and argon, and how to calculate the number of neutrons using the mass number. The tutorial also covers the electronic configuration of these elements, illustrating how electrons are distributed across different shells.

Which of the following particles are found in an atom?

• Protons, Neutrons, and Photons

• Electrons, Photons, and Neutrons

• Protons, Neutrons, and Electrons

• Protons, Photons, and Electrons

What is the atomic number of potassium?

• 19

• 21

• 18

• 20

How many electrons does argon have?

• 19

• 18

• 20

• 17

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

• Mass number plus protons

• Atomic number plus electrons

• Mass number minus protons

• Atomic number minus electrons

What is the mass number of potassium?

• 38

• 39

• 40

• 41

How many neutrons does argon have?

• 21

• 20

• 22

• 23

What is the maximum number of electrons the first shell can hold?

• 6

• 8

• 4

• 2

How many electrons are in the third shell of potassium?

• 6

• 7

• 8

• 9

What is the electronic configuration of argon in terms of electron shells?

• 2, 8, 7

• 2, 8, 9

• 2, 8, 8

• 2, 7, 8

How many electrons are in the fourth shell of potassium?

• 0

• 1

• 3

• 2