Understanding Atomic Structure

The video tutorial explains the structure of a nitrogen atom, including its nucleus, protons, neutrons, and electrons. It guides viewers through labeling a diagram of the atom and calculating its mass number. Additionally, it covers the electronic structure of an oxygen atom, focusing on the arrangement of electrons in shells.

What is the charge of a proton?

• Positive

• Negative

• Variable

• Neutral

Which part of the atom contains protons and neutrons?

• Shell

• Outer layer

• Nucleus

• Electron cloud

In the diagram, which particle is found on the shell?

• Nucleus

• Neutron

• Electron

• Proton

How can you distinguish a proton from a neutron in the nucleus?

• By size

• By shape

• By charge

• By color

What is the mass number of a nitrogen atom with 7 protons and 7 neutrons?

• 28

• 7

• 14

• 21

How is the mass number of an atom calculated?

• Protons + Electrons

• Neutrons + Electrons

• Protons + Neutrons

• Electrons only

What is the atomic number of oxygen?

• 9

• 8

• 7

• 6

Which diagram correctly represents the electronic structure of an oxygen atom?

• Diagram D

• Diagram C

• Diagram B

• Diagram A

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

• 6

• 4

• 8

• 2

Why is diagram C incorrect for representing an oxygen atom?

• It has too many electrons

• It has the wrong number of neutrons

• It has too few electrons

• It has the wrong number of protons