Proton Examples in Chemistry
Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Proton.
This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Chemistry.
Concept Recap
A positively charged subatomic particle found in the nucleus of every atom, with a charge of +1 and a mass of approximately 1 atomic mass.
The identity badge of an atom—how many protons determines what element it is.
Read the full concept explanation →How to Use These Examples
- Read the first worked example with the solution open so the structure is clear.
- Try the practice problems before revealing each solution.
- Use the related concepts and background knowledge badges if you feel stuck.
What to Focus On
Core idea: The number of protons is the atomic number and uniquely determines the element's identity.
Common stuck point: Protons don't change in chemical reactions—only electrons do.
Sense of Study hint: When working with protons, remember they define the element. First look up the atomic number on the periodic table — that is the proton count. Then note that protons never change in chemical reactions, only in nuclear reactions. Finally, the proton count equals the electron count in a neutral atom.
Worked Examples
Example 1
easySolution
- 1 Recall that the atomic number Z is defined as the number of protons in the nucleus.
- 2 Read the atomic number from the periodic table: Z = 16, so this atom has 16 protons.
- 3 Every atom with exactly 16 protons is sulfur (S), regardless of how many neutrons or electrons it has.
Answer
Example 2
mediumPractice Problems
Try these problems on your own first, then open the solution to compare your method.
Example 1
easyExample 2
mediumRelated Concepts
Background Knowledge
These ideas may be useful before you work through the harder examples.