Which of the following statements is not true about an atom?

Options

A. Atoms are not able to exist independently
B. Atoms are the basic units from which molecules and ions are formed.
C. Atoms are always neutral in nature.
D. Atoms aggregate in large numbers to formthe matter that we can see, feel or touch

Explanation

To determine which statement is not true about an atom, we will analyze each of the provided statements one by one.

### Step 1: Analyze the first statement
**Statement:** Atoms are not able to exist independently.
**Analysis:** This statement is true. Atoms typically do not exist in isolation; they combine to form molecules or ions. Therefore, this statement is correct.

### Step 2: Analyze the second statement
**Statement:** Atoms are the basic units from which molecules and ions are formed.
**Analysis:** This statement is also true. Molecules and ions are indeed formed by the combination of atoms. Therefore, this statement is correct.

### Step 3: Analyze the third statement
**Statement:** Atoms are always neutral in nature.
**Analysis:** This statement is true as well. Atoms are neutral because they have an equal number of protons (positively charged) and electrons (negatively charged). Therefore, this statement is correct.

### Step 4: Analyze the fourth statement
**Statement:** Atoms aggregate in large numbers to form the matter that we can see, feel, or touch.
**Analysis:** This statement is misleading. While it is true that atoms aggregate to form matter, we cannot see individual atoms or molecules with the naked eye. We can only see the matter they form when they are in large quantities. Therefore, this statement is not true.

### Conclusion
The statement that is not true about an atom is the fourth statement: "Atoms aggregate in large numbers to form the matter that we can see, feel, or touch."

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