The atomic number of an atom is determined by the number of protons it has. The mass number of an atom is the sum of its protons and neutrons.

Given that the atom has a mass number of 9 and 5 neutrons, you can find the number of protons (and thus the atomic number) by subtracting the number of neutrons from the mass number.

So, 9 (mass number) - 5 (neutrons) = 4 (protons).

Therefore, the atomic number of the atom is 4. So, the correct answer is C.4.

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The atomic number of an atom is determined by the number of protons it has. The mass number of an atom is the sum of its protons and neutrons.

Given that the atom has a mass number of 9 and 5 neutrons, you can find the number of protons (and thus the atomic number) by subtracting the number of neutrons from the mass number.

So, 9 (mass number) - 5 (neutrons) = 4 (protons).

Therefore, the atomic number of the atom is 4. So, the correct answer is C.4.

Knowee AI · Accepted Answer

The atomic number of an atom is determined by the number of protons it has. The mass number of an atom is the sum of its protons and neutrons.

Given that the atom has a mass number of 9 and 5 neutrons, you can find the number of protons (and thus the atomic number) by subtracting the number of neutrons from the mass number.

So, 9 (mass number) - 5 (neutrons) = 4 (protons).

Therefore, the atomic number of the atom is 4. So, the correct answer is C.4.

An atom has a mass number of 9 and 5 neutrons. What is its atomic number?A.11B.14C.4D.19SUBMITarrow_backPREVIOUS

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