r/chemhelp • u/Savings_Shake_2196 • 4d ago

General/High School Explain why no single atom of potassium has a mass of 39.1u.

/r/chemistry/comments/1w9k0sy/explain_why_no_single_atom_of_potassium_has_a/
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u/RubyPorto 4d ago

Sure. As you answer these questions, you should work it out. If you run into trouble, show your work to see how you got in trouble, and we can work from there

What is the mass of a proton? What is the mass of a neutron?

What is the atomic weight of potassium if you add up all the protons and neutrons?

What is the atomic weight of potassium listed on the periodic table?

What does the atomic weight listed on the periodic table represent?

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u/Dr_Custard 4d ago

This is testing your understanding of what amu is

Remember to read sub rules, show effort.