Atomic Structure and Electron Configuration

The video tutorial explains the structure of atoms, focusing on protons, electrons, and neutrons. It details how to calculate the number of these particles for elements like potassium and argon. The tutorial also covers the concept of mass number and how to determine the number of neutrons. Additionally, it explains the electronic configuration of these elements, illustrating how electrons are distributed across different shells.

What are the three fundamental particles that make up an atom?

• Protons, Neutrons, and Photons

• Protons, Electrons, and Neutrons

• Electrons, Neutrons, and Positrons

• Protons, Electrons, and Photons

What does the atomic number of an element represent?

• The number of neutrons in an atom

• The total number of particles in an atom

• The number of electrons in an atom

• The number of protons in an atom

How many protons does potassium (K) have?

• 21

• 20

• 19

• 18

In a neutral atom, the number of protons is equal to the number of which other particle?

• Neutrons

• Electrons

• Photons

• Quarks

How many electrons does argon (Ar) have?

• 16

• 17

• 18

• 19

What is the formula to calculate the number of neutrons in an atom?

• Neutrons = Mass number - Protons

• Neutrons = Mass number - Electrons

• Neutrons = Mass number + Protons

• Neutrons = Protons - Electrons

How many neutrons does potassium (K) have?

• 21

• 20

• 19

• 18

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

• 4

• 8

• 6

• 2

How are the 19 electrons of potassium (K) distributed across its shells?

• 2 in the first, 8 in the second, 8 in the third, 1 in the fourth

• 2 in the first, 8 in the second, 7 in the third, 2 in the fourth

• 2 in the first, 8 in the second, 9 in the third

• 2 in the first, 7 in the second, 8 in the third, 2 in the fourth

How are the 18 electrons of argon (Ar) distributed across its shells?

• 2 in the first, 8 in the second, 7 in the third, 1 in the fourth

• 2 in the first, 8 in the second, 9 in the third

• 2 in the first, 7 in the second, 8 in the third, 1 in the fourth

• 2 in the first, 8 in the second, 8 in the third