Mathis Chadwick
04/27/2024 · Elementary School
One atom has 20 protons and a mass of 44 . Another atom has 20 protons and a mass number of 40 . What is the identity of these atoms? How do you account for the difference in mass numbers?
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The atoms are isotopes of calcium (Ca). Ca-44 has 20 protons and 24 neutrons, while Ca-40 has 20 protons and 20 neutrons. The difference in mass numbers is due to the varying number of neutrons.
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