How would you describe the structure ot an atom?
Up to GCSE it is a very small positive nucleus which has protons and neutrons, surrounded by negative electrons in shells or energy levels around it.
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Protons and neutrons make up an atom's nucleus, which is made up of the majority of the atom's mass; electrons, on the other hand, have very little mass; the number of protons determines the atom's identity (atomic number); the total number of protons and neutrons determines the atom's mass number; electrons participate in chemical bonding and reactions and occupy specific energy levels based on their distance from the nucleus.
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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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