QQ: A magnesium atom has 12 protons and 15 neutrons. The Periodic Table shows Magnesium has an atomic mass of 24.31. Explain how this can be true.

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Presentation transcript:

QQ: A magnesium atom has 12 protons and 15 neutrons. The Periodic Table shows Magnesium has an atomic mass of 24.31. Explain how this can be true.

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This is the first scientist that understood that atoms could be combined to form molecules. John Dalton

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This scientist discovered the relationship between the energy an electron contains and where it can be found in relation to the nucleus. Bohr

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