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Hello.
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Today we're going to be looking at chapter six, question six, looking for elements on the periodic table that have an atomic mass that is less than twice the atomic number.
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So first, let's just think about what an element on the periodic table looks like.
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So i'm just going to draw a representative box and an example.
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So boxes on the periodic table always have the atomic number at the top, the chemical symbol in the middle, and then the information on the bottom sometimes has the atomic mass.
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Some periodic tables just show the number in the symbol, but you would expect the atomic mass at the bottom.
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And so if we look at an example, we might have element number 29.
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It's the atomic number.
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It's the number of protons in the nucleus of the atom.
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This would be copper, and this copper has an atomic mass of 63 .546 atomic mass units.
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So amu...