Question

26 how many protons does potassium - 42 have? (1 point) 23 19 42 39

Explanation:

• The atomic number of potassium (K) is 19.
• The atomic number is equal to the number of protons in an atom.
• The number 42 in Potassium - 42 is the mass number (sum of protons and neutrons), which is not relevant for finding the number of protons.

Answer:

19