Which of the following describes what happens when an atom becomes an anion with a 2 charge?

Options

A. The atom gains 2 protons
B. The atom loses 2 protons
C. The atom gains 2 eléctrons.
D. The atom loses 2 electrons

Explanation

To understand what happens when an atom becomes an anion with a 2 charge, we can break it down into steps:

### Step-by-Step Solution:

1. **Definition of Anion**: An anion is a negatively charged ion. This means that the atom has gained electrons.

**Hint**: Remember that anions are formed when atoms gain electrons.

2. **Understanding Charge**: When an atom becomes an anion with a 2 charge (denoted as A²⁻), it means that it has gained two extra electrons.

**Hint**: The superscript in the notation A²⁻ indicates the number of electrons gained.

3. **Electron Gain**: The atom (let's call it A) will gain 2 electrons to achieve this negative charge.

**Hint**: Think about how gaining electrons affects the overall charge of the atom.

4. **Proton Count**: The number of protons in the nucleus of the atom remains unchanged. Protons determine the identity of the element, so even after gaining electrons, the atom still has the same number of protons.

**Hint**: Remember that protons are not gained or lost during the formation of anions.

5. **Final State**: After gaining 2 electrons, the atom is now represented as A²⁻, indicating it is an anion with a 2 negative charge.

**Hint**: The final charge of the anion reflects the number of electrons gained compared to the number of protons.

### Summary:
When an atom becomes an anion with a 2 charge, it gains 2 electrons while the number of protons remains the same, resulting in a negatively charged ion (A²⁻).