Practice Proton in Chemistry
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
A positively charged subatomic particle found in the nucleus of every atom, whose count defines the element's identity.
The identity badge of an atom—how many protons determines what element it is.
Example 1
easyA sulfur atom has 16 protons. What is its atomic number, and how does the number of protons relate to its identity as sulfur?
Example 2
mediumThe mass of a single proton is approximately 1.673 \times 10^{-24} g. How many protons would it take to have a combined mass of 1 g?
Example 3
easyHow many protons are in an atom of potassium (K, atomic number 19)?
Example 4
mediumWhy doesn't sodium turn into magnesium during an ordinary chemical reaction, even if electrons are lost or gained?