If an atom has 9 protons and 10 neutrons, what is its atomic number?

Answer 1

The number of neutrons is obtain through the difference of the mass number and the number of electrons.

By looking at the periodic table, you will see that Fluorine has 9 protons.

Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well.

Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.

As for the atomic number, it is obtainable through the periodic table itself.

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Answer 2

Since an atom's atomic number is determined by the number of protons it contains, an atom with nine protons has an atomic number of nine.

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Answer from HIX Tutor

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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