There is an equation 'X', which contains equal number of atoms of each element on both the sides. What is 'X'?

Options

A. A balanced equation
B. An unbalanced equation
C. A chemical equation
D. All of the above

Explanation

To solve the question, we need to determine what 'X' represents when it states that there is an equal number of atoms of each element on both sides of the equation.

### Step-by-Step Solution:

1. **Understanding Chemical Equations**: A chemical equation represents a chemical reaction where reactants are transformed into products. The equation consists of reactants on the left side and products on the right side.

**Hint**: Recall that in a chemical equation, the left side represents the reactants and the right side represents the products.

2. **Balanced vs. Unbalanced Equations**: In a balanced chemical equation, the number of atoms of each element is the same on both sides of the equation. This means that the mass is conserved during the reaction.

**Hint**: Remember that balancing chemical equations is essential to obey the law of conservation of mass.

3. **Identifying 'X'**: The question states that 'X' contains an equal number of atoms of each element on both sides. This characteristic defines a balanced chemical equation.

**Hint**: Think about what it means for an equation to be balanced—each element's count must match on both sides.

4. **Conclusion**: Therefore, 'X' is a balanced chemical equation. An example of a balanced equation is the combustion of magnesium:
\[ 2Mg + O_2 \rightarrow 2MgO \]
In this equation, there are 2 magnesium (Mg) atoms and 2 oxygen (O) atoms on both sides.

**Hint**: You can check if an equation is balanced by counting the number of atoms of each element on both sides.

### Final Answer:
'X' is a balanced chemical equation.