Question

You're selecting pictures for a class presentation on your new favorite element, oxygen, O. You're told this is a correct model of an atom of this element. Select all that are true.
(bohr model diagram with red and yellow balls in the middle and 2 blue balls on the first inner valence shell and 6 blue balls on the secound outer valence shell)
4 points)
Responses

The total mass of this atom is a combination of red and yellow dots.
The total mass of this atom is a combination of red and yellow dots.

The valence of oxygen is 6.
The valence of oxygen is 6.

There are 8 protons located in the nucleus.
There are 8 protons located in the nucleus.

The blue dots represent electrons in the electron cloud.
The blue dots represent electrons in the electron cloud.

There are 8 electrons located in the nucleus.
There are 8 electrons located in the nucleus.

The valence is determined by the red yellow dots.

Answer 1

Let's analyze each of the statements based on the provided Bohr model of an oxygen atom:

1. **The total mass of this atom is a combination of red and yellow dots.**
- **True.** In the Bohr model, the red and yellow dots represent protons and neutrons in the nucleus, which contribute to the mass of the atom.

2. **The valence of oxygen is 6.**
- **False.** Oxygen has 6 electrons in its outer shell, but the "valence" refers to how many electrons it needs to gain, lose, or share to bond with other elements, which is 2 in the case of oxygen (it needs 2 more to fill its outer shell).

3. **There are 8 protons located in the nucleus.**
- **True.** Oxygen has an atomic number of 8, which means there are 8 protons in its nucleus.

4. **The blue dots represent electrons in the electron cloud.**
- **True.** In the Bohr model, the blue dots represent electrons that orbit the nucleus in different energy levels or shells.

5. **There are 8 electrons located in the nucleus.**
- **False.** Electrons are not located in the nucleus; they are found in the electron cloud surrounding the nucleus. There are 8 electrons in total for an oxygen atom, but they are not in the nucleus.

6. **The valence is determined by the red yellow dots.**
- **False.** The valence is determined by the outermost electrons (the blue dots in this case), not by the protons or neutrons in the nucleus.

In summary, the true statements are:

- The total mass of this atom is a combination of red and yellow dots.
- There are 8 protons located in the nucleus.
- The blue dots represent electrons in the electron cloud.