Identify true or false statements among the following and rewrite the correct statements.

Options

A. An elements is made up of many kinds of atoms
B. `3O_(2)` contains six atoms of oxygen.
C. One molecule of calcium oxide contains three atoms,
D. formula of nitrogen dioxide is `NO_(2)`

Explanation

### Step-by-Step Solution:

1. **Statement A**: "An element is made up of many kinds of atoms."
- **Evaluation**: This statement is **false**. An element is made up of only one kind of atom.
- **Correct Statement**: "An element is made up of the same kind of atoms."

2. **Statement B**: "3O2 contains 6 oxygen atoms."
- **Evaluation**: This statement is **true**. The molecule O2 consists of 2 oxygen atoms, so 3O2 will have 3 x 2 = 6 oxygen atoms.
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