Understanding Atomic Structure

The video tutorial explains the structure of a nitrogen atom, including labeling its parts such as protons, neutrons, and electrons. It covers how to calculate the mass number by adding protons and neutrons. Finally, it discusses the electronic structure of an oxygen atom, identifying the correct diagram based on the number of electrons and their arrangement in shells.

What is the central part of an atom called?

• Proton

• Nucleus

• Shell

• Electron

Which particle in an atom is negatively charged?

• Proton

• Nucleus

• Neutron

• Electron

How can you identify a proton in a diagram?

• By its positive charge

• By its neutral charge

• By its location outside the nucleus

• By its negative charge

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

• 7

• 28

• 14

• 21

What does the atomic number of an element represent?

• Number of shells

• Number of neutrons

• Number of electrons

• Number of protons

How many electrons should an oxygen atom have?

• 8

• 6

• 10

• 12

Which diagram can be eliminated if it has only 6 electrons for an oxygen atom?

• Diagram D

• Diagram A

• Diagram B

• Diagram C

Why can Diagram A be eliminated when identifying the electronic structure of oxygen?

• It has too many electrons

• It has too few electrons

• It has four electrons in the first shell

• It has no electrons in the second shell

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

• 2

• 4

• 1

• 6

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

• Diagram C

• Diagram D

• Diagram B

• Diagram A