Hydrogen Isotopes and Properties

The video tutorial explains how to identify elements using the periodic table, focusing on the number of protons, which corresponds to the atomic number. It highlights that hydrogen, with one proton, can have different isotopes depending on the number of neutrons. The tutorial specifically discusses hydrogen-3, an isotope with one proton and two neutrons, emphasizing that the element remains hydrogen due to its single proton.

What does the atomic number of an element represent?

• The total number of electrons and protons

• The number of electron shells

• The number of protons in the element

• The number of neutrons in the element

Which element has an atomic number of one?

• Helium

• Oxygen

• Hydrogen

• Carbon

What remains constant in all isotopes of hydrogen?

• The number of electron shells

• The atomic mass

• The number of protons

• The number of neutrons

How many neutrons does the most common isotope of hydrogen have?

• Two

• One

• Three

• Zero

What is the mass number of hydrogen-3?

• One

• Two

• Four

• Three

Why is hydrogen-3 still considered hydrogen?

• It has two neutrons

• It has one proton

• It has three electrons

• It has a mass number of three