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Elements with valency 1 are:(i) Always metals. (ii) Always metalloids.(iii) Either metals or non-metals. (iv)Always non-metals.

Question

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Solution

To determine which statement is correct regarding elements with valency 1, we must analyze the valency concept and the characteristics of elements.

  1. Understanding Valency: Valency is the measure of the ability of an atom to combine with other atoms. An element with a valency of 1 can lose or gain one electron to form a bond.

  2. Types of Elements:

    • Metals, like sodium (Na) and potassium (K), often have a valency of 1, as they readily lose one electron.
    • Non-metals, such as hydrogen (H) and fluorine (F), can also exhibit a valency of 1 by either losing or gaining an electron.
  3. Classification of Elements:

    • Metals: Generally have low electronegativity and easily lose electrons.
    • Non-metals: Can either gain or share electrons to achieve a stable electron configuration.
  4. Conclusion: Since elements with valency 1 may be either metals or non-metals, the correct statement is (iii) "Either metals or non-metals."

Thus, the final answer is:

Final Answer

(iii) Either metals or non-metals.

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