Understanding Atomic Numbers

The video tutorial explains the concept of atomic numbers, also known as proton numbers, which represent the number of protons in an atom's nucleus. It highlights that the atomic number is typically the whole number above the element symbol on the periodic table. The tutorial demonstrates how atomic numbers increase by one as you move across a period. Examples of atomic numbers for elements like copper, carbon, and argon are provided, emphasizing the importance of identifying the correct whole number. The video concludes with a recap of the key points discussed.

What is the atomic number also known as?

• Neutron number

• Electron number

• Mass number

• Proton number

Where is the atomic number typically located on the periodic table?

• To the left of the element symbol

• Above the element symbol

• To the right of the element symbol

• Below the element symbol

How does the atomic number change as you move across a period?

• It decreases by one

• It remains the same

• It increases by one

• It doubles

What is the atomic number of copper?

• 6

• 18

• 29

• 12

Which number represents the atomic number for carbon?

• 6

• 18

• 12

• 29

What is the atomic number of argon?

• 19

• 18

• 20

• 17

How can you confirm the atomic number of argon?

• By checking the mass number

• By checking the number of neutrons

• By looking at the largest number

• By counting the electrons

What does the atomic number indicate about an element?

• Number of neutrons

• Atomic mass

• Number of electrons

• Number of protons

Why is the atomic number important?

• It indicates the element's state

• It shows the element's weight

• It identifies the element

• It determines the element's color

What is another name for the atomic number?

• Electron number

• Mass number

• Neutron number

• Proton number