Understanding Atomic Numbers and Elements

The video tutorial explains how to identify the element with only one proton on the periodic table. It introduces the concept of atomic numbers, which represent the number of protons in an element. By examining the periodic table, the tutorial demonstrates that hydrogen, with an atomic number of one, is the element with a single proton. The video concludes by reinforcing the relationship between atomic numbers and protons, highlighting hydrogen as the first element on the periodic table.

What does the atomic number of an element represent?

• The number of protons in the element

• The number of electrons in the element

• The atomic mass of the element

• The number of neutrons in the element

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

• To the right of the element symbol

• To the left of the element symbol

• Above the element symbol

• Below the element symbol

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 doubles

• It increases by one

Which element is identified by having an atomic number of one?

• Helium

• Oxygen

• Hydrogen

• Carbon

Why is hydrogen considered the first element on the periodic table?

• It has the highest atomic mass

• It has one proton

• It is the most abundant element

• It is a noble gas