What element has a mass number of 40?
Ellie AndrewsArgon [Ar] has mass number (A) = 40.
The total number of protons and neutrons in an element's nucleus is equal to its mass number (A).
In Argon, therefore, electrons = 18 protons = 18 neutrons = 22 A = neutrons + protons = 22 + 18 = 40.
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The element with a mass number of 40 is calcium (Ca).
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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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