Element 'A' has Electronic confguration 2,7 'B' has configuration 2,8,6, 'C' has configuration 2,8,8 while 'D' has 2,8,7. Which element will show similar chemical properties?

Options

A. A and C
B. A and D
C. B and C
D. B and D

Explanation

To determine which elements will show similar chemical properties based on their electronic configurations, we need to identify their valence electrons. Elements with the same number of valence electrons typically belong to the same group in the periodic table and exhibit similar chemical properties.

### Step-by-Step Solution:

1. **Identify the Electronic Configurations**:
- Element A: 2, 7
- Element B: 2, 8, 6
- Element C: 2, 8, 8
- Element D: 2, 8, 7

2. **Determine the Valence Electrons**:
- Valence electrons are the electrons in the outermost shell of an atom.
- For Element A (2, 7): The outermost shell has 7 electrons.
- For Element B (2, 8, 6): The outermost shell has 6 electrons.
- For Element C (2, 8, 8): The outermost shell has 8 electrons.
- For Element D (2, 8, 7): The outermost shell has 7 electrons.

3. **Compare the Valence Electrons**:
- Element A has 7 valence electrons.
- Element B has 6 valence electrons.
- Element C has 8 valence electrons.
- Element D has 7 valence electrons.

4. **Identify Similar Elements**:
- Elements A and D both have 7 valence electrons.
- Since they have the same number of valence electrons, they are likely to belong to the same group and will exhibit similar chemical properties.

5. **Conclusion**:
- The elements that will show similar chemical properties are Element A and Element D.

### Final Answer:
Elements A and D will show similar chemical properties.

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