Atomic Structure worksheet with labeling, questions, and atomic model identification.

Task: Solve the problems related to atomic structure as shown in the image.

#### Part 1: Label the parts of the atom
The diagram shows a basic model of an atom. Here are the labels for each part:

1. Nucleus: The central part of the atom containing protons and neutrons.
2. Proton: Positively charged particles in the nucleus.
3. Neutron: Neutral (no charge) particles in the nucleus.
4. Electron: Negatively charged particles orbiting the nucleus.
5. Orbital/Shell: The region around the nucleus where electrons are found.

So, the labels for the diagram would be:
- Top left: Electron
- Bottom left: Neutron
- Center: Proton
- Right side: Nucleus
- Outer circle: Orbital/Shell

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#### Part 2: Answer the following questions
Let's address each question step by step:

a. What part of the atom has no charge?
- Answer: Neutron

b. What part of the atom has a positive charge?
- Answer: Proton

c. What part of the atom has a negative charge?
- Answer: Electron

d. How many electrons can be held in the first orbital?
- Answer: 2
- The first orbital (also called the 1s orbital) can hold a maximum of 2 electrons.

e. How many electrons can be held in the second orbital?
- Answer: 8
- The second orbital consists of the 2s and 2p subshells. The 2s subshell holds 2 electrons, and the 2p subshell holds 6 electrons, for a total of 8 electrons.

f. The atomic number represents the number of which particles?
- Answer: Protons
- The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element.

g. The mass number is determined by the sum of the numbers of which particles?
- Answer: Protons and Neutrons
- The mass number is the total number of protons and neutrons in the nucleus of an atom.

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#### Part 3: Identify the atoms from their atomic structures
We need to identify the elements based on their atomic structures. Let's analyze each one:

1. First Atom:
- Protons: 8 (count the positively charged particles in the nucleus)
- Electrons: 8 (count the negatively charged particles orbiting the nucleus)
- Atomic Number: 8 (equal to the number of protons)
- Element: Oxygen (O)

2. Second Atom:
- Protons: 17 (count the positively charged particles in the nucleus)
- Electrons: 17 (count the negatively charged particles orbiting the nucleus)
- Atomic Number: 17 (equal to the number of protons)
- Element: Chlorine (Cl)

3. Third Atom:
- Protons: 9 (count the positively charged particles in the nucleus)
- Electrons: 9 (count the negatively charged particles orbiting the nucleus)
- Atomic Number: 9 (equal to the number of protons)
- Element: Fluorine (F)

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Final Answers:

1. Labels for the atom diagram:
- Top left: Electron
- Bottom left: Neutron
- Center: Proton
- Right side: Nucleus
- Outer circle: Orbital/Shell

2. Answers to the questions:
- a. Neutron
- b. Proton
- c. Electron
- d. 2
- e. 8
- f. Protons
- g. Protons and Neutrons

3. Identify the atoms:
- First atom: Oxygen (O)
- Second atom: Chlorine (Cl)
- Third atom: Fluorine (F)

Boxed Final Answer:

\[
\boxed{
\text{1. Labels: Electron, Neutron, Proton, Nucleus, Orbital/Shell}
}
\]
\[
\boxed{
\text{2. a. Neutron, b. Proton, c. Electron, d. 2, e. 8, f. Protons, g. Protons and Neutrons}
}
\]
\[
\boxed{
\text{3. Oxygen (O), Chlorine (Cl), Fluorine (F)}
}
\]