Identify the correct statement from the following.
(a) Symbol of copper is Co
(b) Silicon is a liquid
(c ) The German name of tin is stannum
(d) Blue vitriol is `CuSO_(4). 6H_(2)O`
(e) Formula of magnesium sulphide is `Mg_(2)S`

Explanation

To identify the correct statement from the given options, let's analyze each one step-by-step:

### Step 1: Analyze the first statement
- **Statement (a)**: The symbol of copper is Co.
- The correct symbol for copper is **Cu**, not Co (which is the symbol for cobalt). Therefore, this statement is **incorrect**.

### Step 2: Analyze the second statement
- **Statement (b)**: Silicon is a liquid.
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