Four elements A, B, C and D along with their configurations are given below: Element A-2,1: Element B-2, 8, Element C-2, 8, 1, Element D-2, 8, 8
Which element out of A and C is more reactive and why?

Explanation

To determine which element out of A and C is more reactive, we can follow these steps:

### Step 1: Analyze the Electron Configurations
- Element A has the electron configuration of 2,1.
- Element C has the electron configuration of 2,8,1.

### Step 2: Identify the Valence Electrons
- Both elements A and C have one valence electron in their outermost shell. This means they both have the same tendency to lose an electron to achieve a stable electronic configuration.
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