If atomic number of an element is 11, the correct name, symbol and valency are:
- A. Lithium, Li, 1
- B. Magnesium, Mg, 2
- C. Boron, B, 3
- D. Sodium, Na, 1 ✓
Correct Answer: D. Sodium, Na, 1
Explanation
The element with atomic number 11 is Sodium (Na). Its electronic configuration is 2, 8, 1, giving it a valency of 1.
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