Understanding Isotopes and Atomic Structure

The video tutorial explains how to identify an element based on its atomic number, focusing on carbon, which has six protons and six neutrons. It describes the concept of atomic number, the structure of carbon, and its isotopes. The tutorial also covers how to write isotope notation for carbon-12, emphasizing the relationship between protons, neutrons, and mass number.

What does the atomic number of an element represent?

• The number of neutrons in the element

• The number of protons in the element

• The number of electrons in the element

• The total mass of the element

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

• It decreases by one

• It remains the same

• It increases by one

• It doubles

Which element is identified by having six protons?

• Oxygen

• Nitrogen

• Helium

• Carbon

What is true about the number of neutrons in carbon?

• It can vary due to isotopes

• It is always six

• It is always equal to the number of protons

• It is always twelve

What is the mass number of carbon-12?

• 24

• 18

• 12

• 6

Why is carbon-12 called an isotope?

• Because it has a different atomic number

• Because it has a different number of neutrons

• Because it has a different number of electrons

• Because it has a different number of protons