Determining Protons, Neutrons, and Electrons from the Periodic Table

This video tutorial explains how to determine the number of protons, neutrons, and electrons in an atom. It covers the concept of atomic number, the relationship between protons and electrons in neutral atoms, and how to calculate the mass number. The video also delves into isotopes, using carbon as an example, and discusses how isotopes differ in neutron count while maintaining the same number of protons.

What does the atomic number of an element represent?

• The number of neutrons

• The number of protons

• The number of electrons

• The mass number

Where can you typically find the atomic number on the periodic table?

• To the right of the element symbol

• Below the element symbol

• To the left of the element symbol

• Above the element symbol

For a neutral element, the number of protons is equal to the number of:

• Neutrons

• Electrons

• Atoms

• Ions

What is the mass number of an element?

• The sum of protons and electrons

• The sum of neutrons and electrons

• The sum of protons and neutrons

• The sum of protons, neutrons, and electrons

If an element has 11 protons and 12 neutrons, what is its mass number?

• 23

• 24

• 12

• 11

What is the atomic number of oxygen?

• 6

• 12

• 8

• 16

What defines an isotope of an element?

• Different number of electrons

• Different atomic number

• Different number of protons

• Different number of neutrons

Which isotope of carbon has 6 protons and 8 neutrons?

• Carbon-14

• Carbon-13

• Carbon-15

• Carbon-12

How many neutrons does Carbon-13 have?

• 8

• 7

• 9

• 6

What is the mass number of an isotope of calcium with 20 protons and 20 neutrons?

• 60

• 80

• 40

• 20