SOLUTION: Atomic mass and atomic number worksheet key - Studypool - Free Printable

It looks like you've uploaded a completed Atomic Mass and Atomic Number Worksheet - Key, which lists various elements along with their atomic numbers, atomic masses, number of protons, neutrons, and electrons.

However, there seems to be no specific problem or question presented in the image. The table appears to be a reference key for a worksheet, showing correct answers for common elements.

Let me explain what this table represents and how it works:

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🔍 Understanding the Table

Each row corresponds to an element, and the columns provide the following information:

| Column | Meaning |
|--------|--------|
| Name of Element | The full name of the chemical element (e.g., copper) |
| Symbol | The chemical symbol (e.g., Cu) |
| Atomic Number | Number of protons in the nucleus (defines the element) |
| Atomic Mass | Approximate mass of the atom (in atomic mass units, u), usually rounded to the nearest whole number |
| Protons | Equal to the atomic number |
| Neutrons | Calculated as: Atomic Mass – Atomic Number |
| Electrons | In neutral atoms, equal to the number of protons |

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✔ How to Calculate Neutrons

For any atom:
> Neutrons = Atomic Mass – Atomic Number

#### Example: Copper (Cu)
- Atomic Mass = 64
- Atomic Number = 29
- Neutrons = 64 – 29 = 35 ✔

This matches the value in the table.

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🧪 Why This Matters

This type of worksheet helps students understand:
- The relationship between atomic number, mass, and subatomic particles.
- That protons = atomic number.
- That electrons = protons in neutral atoms.
- That neutrons = mass number – atomic number.

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⚠️ Notes on Accuracy

Some values are rounded (especially atomic masses). For example:
- Uranium has an actual atomic mass of ~238.03, but it's listed as 238.
- This is acceptable for educational purposes.

Also, isotopes can vary slightly in neutron count, but this table assumes the most common or stable isotope.

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❓ What Can You Do With This?

If you have a specific question based on this table — such as:
- "How many neutrons does iodine have?"
- "Why does hydrogen have 0 neutrons?"
- "What is the electron configuration of oxygen?"

…please let me know, and I’ll help you solve it!

Otherwise, this table is a correct reference guide for identifying subatomic particles in neutral atoms.

Let me know if you'd like me to generate a similar worksheet or explain any particular element!