CHEMISTRY MIDDLE SCHOOL

Zinc has the chemical symbol Zn and the atomic number 30. How many protons, neutrons, and electrons does an atom of zinc-69 have?A. 30 protons, 39, neutrons, 39 neutrons
B. 39 protons, 30 neutrons, 30 neutrons
C. 39 protons, 30 neutrons, 39 electrons
D. 30 protons, 39, neutrons, 30 electrons

Answers

Answer 1
Answer:

Answer:

D. 30 protons, 39 neutrons, 30 electrons

Explanation:

The atomic number (Z) is the number of protons (p) in the nucleus. Since

Z = 30, p = 30.

In a neutral atom, the number of electrons (e) equals the number of protons. Since p = 30, e = 30.

The mass number (A) is the number of protons plus the number of neutrons (n).

A = p + n

For an atom of zinc-69,

69 = 30 + n     Subtract 30 from each side and transpose

n = 39
Answer 2
Answer:

Zinc has the chemical symbol Zn and the atomic number 30. D. 30 protons, 39, neutrons, 30 electrons

What is Zinc

Zinc has the chemical symbol Zn, and its atomic number is 30. This means that every atom of zinc contains 30 protons in its nucleus.

An atom of zinc-69 (Zn-69) is one that contains:

- 30 protons (since zinc has an atomic number of 30).

- 39 neutrons (subtract the atomic number from the mass number: 69 - 30 = 39).

- 30 electrons (in a neutral atom, the number of electrons is equal to the number of protons).

So, the correct option is option d 30 protons, 39 neutrons, 30 electrons.

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Answers

Answer:

The correct answer will be option- The structure of a cell organelle is directly related to its function.

Explanation:

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Thus, the selected option is the correct answer.
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Answers

Answer:

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Explanation:

B
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Answers

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Answers

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