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The atomic number is 5, it has 5 neutrons and no charge. What element is it?

a. Hydrogen
b. Helium
c. Boron
d. Carbon

1 Answer

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Final answer:

Boron (B) is the element with an atomic number of 5, which defines the number of protons in its nucleus, and it also has five neutrons, matching the information provided.

Step-by-step explanation:

The element with an atomic number of 5 is boron (B). The atomic number represents the number of protons in an atom's nucleus, and in this case, with five protons, the element is indeed boron. The given information also states that the atom has five neutrons and no charge indicating it is neutral. Since neutral atoms have the same number of electrons as protons, a boron atom with five protons will also have five electrons. The presence of five neutrons gives this particular isotope of boron a mass number of 10, which is the sum of the number of protons and neutrons in the nucleus.

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