Free Printable Atomic Structure Worksheets - Free Printable

Problem Analysis:

The worksheet involves understanding atomic structure, isotopes, ions, and the periodic table. Let's solve each part step by step.

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Part 1: Completing the Table for Different Atoms and Ions

#### Given Information:
- Mg (Magnesium): Atomic number = 12
- Mg²⁺ (Magnesium ion): Atomic number = 12
- F (Fluorine):
- F⁻ (Fluoride ion):

We need to fill in the missing values for Proton Number, Neutron Number, Electron Number, and Mass Number using the periodic table and rules of atomic structure.

#### Rules to Remember:
1. Proton Number = Atomic Number
2. Mass Number = Proton Number + Neutron Number
3. Electron Number = Proton Number (for neutral atoms)
4. For ions:
- Positive ions (cations) lose electrons: Electron Number = Proton Number - Charge
- Negative ions (anions) gain electrons: Electron Number = Proton Number + Charge

#### Step-by-Step Solution:

##### Row 1: Mg (Magnesium)
- Atomic Number: 12
- Proton Number: 12 (same as atomic number)
- Neutron Number: 12 (given)
- Electron Number: 12 (neutral atom, same as proton number)
- Mass Number: Proton Number + Neutron Number = 12 + 12 = 24

##### Row 2: Mg²⁺ (Magnesium Ion)
- Atomic Number: 12
- Proton Number: 12 (same as atomic number)
- Neutron Number: Not given, but we can infer it from the mass number.
- Mass Number = 24 (given)
- Neutron Number = Mass Number - Proton Number = 24 - 12 = 12
- Electron Number: Mg²⁺ has a +2 charge, meaning it lost 2 electrons.
- Electron Number = Proton Number - Charge = 12 - 2 = 10

##### Row 3: F (Fluorine)
- Atomic Number: From the periodic table, Fluorine (F) has an atomic number of 9.
- Proton Number: 9 (same as atomic number)
- Neutron Number: 10 (given)
- Electron Number: 9 (neutral atom, same as proton number)
- Mass Number: Proton Number + Neutron Number = 9 + 10 = 19

##### Row 4: F⁻ (Fluoride Ion)
- Atomic Number: 9 (same as Fluorine)
- Proton Number: 9 (same as atomic number)
- Neutron Number: 10 (given)
- Electron Number: F⁻ has a -1 charge, meaning it gained 1 electron.
- Electron Number = Proton Number + Charge = 9 + 1 = 10
- Mass Number: 19 (given)

#### Completed Table:

| Element | Atomic Number | Proton Number | Neutron Number | Electron Number | Mass Number |
|---------|---------------|---------------|----------------|-----------------|-------------|
| Mg | 12 | 12 | 12 | 12 | 24 |
| Mg²⁺ | 12 | 12 | 12 | 10 | 24 |
| F | 9 | 9 | 10 | 9 | 19 |
| F⁻ | 9 | 9 | 10 | 10 | 19 |

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Part 2: Analyzing Particles X, Y, and Z

#### Given Information:
| Particle | Proton Number | Neutron Number | Electron Number |
|----------|---------------|----------------|-----------------|
| X | 15 | 16 | 15 |
| Y | 15 | 16 | 18 |
| Z | 15 | 17 | 15 |

#### Questions to Answer:
a) Particle X is an atom.
b) Particle Y is a negative ion.
c) X, Y, and Z are all particles of the same element.
d) Particles X and Z are isotopes of the same element.
e) Particles X and Z have zero charges.

#### Step-by-Step Solution:

##### a) Particle X is an atom.
- Evidence: For particle X:
- Proton Number = 15
- Electron Number = 15
- Since the number of protons equals the number of electrons, particle X is electrically neutral, which is characteristic of an atom.

##### b) Particle Y is a negative ion.
- Evidence: For particle Y:
- Proton Number = 15
- Electron Number = 18
- Since the number of electrons (18) is greater than the number of protons (15), particle Y has a net negative charge. This indicates that it is a negative ion.

##### c) X, Y, and Z are all particles of the same element.
- Evidence: All three particles (X, Y, and Z) have the same Proton Number (15). The proton number determines the element, so they are all particles of the same element.

##### d) Particles X and Z are isotopes of the same element.
- Evidence: Isotopes are atoms of the same element with different neutron numbers.
- Particle X: Proton Number = 15, Neutron Number = 16
- Particle Z: Proton Number = 15, Neutron Number = 17
- Both have the same proton number (15) but different neutron numbers (16 and 17), so they are isotopes.

##### e) Particles X and Z have zero charges.
- Evidence:
- Particle X: Proton Number = 15, Electron Number = 15 → Neutral (no charge).
- Particle Z: Proton Number = 15, Electron Number = 15 → Neutral (no charge).
- Both particles have equal numbers of protons and electrons, so they are electrically neutral.

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Final Answers:

1. Completed Table:
| Element | Atomic Number | Proton Number | Neutron Number | Electron Number | Mass Number |
|---------|---------------|---------------|----------------|-----------------|-------------|
| Mg | 12 | 12 | 12 | 12 | 24 |
| Mg²⁺ | 12 | 12 | 12 | 10 | 24 |
| F | 9 | 9 | 10 | 9 | 19 |
| F⁻ | 9 | 9 | 10 | 10 | 19 |

2. Statements:
a) Particle X is an atom.
Evidence: Proton Number = Electron Number (15 = 15).
b) Particle Y is a negative ion.
Evidence: Electron Number > Proton Number (18 > 15).
c) X, Y, and Z are all particles of the same element.
Evidence: All have the same Proton Number (15).
d) Particles X and Z are isotopes of the same element.
Evidence: Same Proton Number (15) but different Neutron Numbers (16 and 17).
e) Particles X and Z have zero charges.
Evidence: Proton Number = Electron Number for both (15 = 15).

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Final Boxed Answer:

\[
\boxed{
\begin{array}{|c|c|c|c|c|c|}
\hline
\text{Element} & \text{Atomic Number} & \text{Proton Number} & \text{Neutron Number} & \text{Electron Number} & \text{Mass Number} \\
\hline
\text{Mg} & 12 & 12 & 12 & 12 & 24 \\
\hline
\text{Mg}^{2+} & 12 & 12 & 12 & 10 & 24 \\
\hline
\text{F} & 9 & 9 & 10 & 9 & 19 \\
\hline
\text{F}^- & 9 & 9 & 10 & 10 & 19 \\
\hline
\end{array}
}
\]