Identify and name the metal whose electronic configuration is given below :
`2,1`

Explanation

To identify and name the metal with the electronic configuration `2,1`, we can follow these steps:

### Step 1: Understand the Electronic Configuration
The electronic configuration `2,1` indicates that there are 2 electrons in the first shell (K shell) and 1 electron in the second shell (L shell). This means the total number of electrons is 3.

### Step 2: Determine the Number of Protons
For a neutral atom, the number of electrons is equal to the number of protons. Therefore, if there are 3 electrons, there must also be 3 protons.

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