What is the difference between the two isotopes of Li (Lithium)?
One neutron........
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Lithium is found in two different isotopes: lithium-6 and lithium-7. Lithium-6 has three protons and three neutrons, or an atomic mass of about six atomic mass units (u), while lithium-7 has three protons and four neutrons, or an atomic mass of about seven u.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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