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77julia77 [94]
3 years ago
11

Which of the following elements is most nonmetallic - most wanting of electrons?

Chemistry
1 answer:
Ierofanga [76]3 years ago
3 0

Answer:

B. Fluorine

Explanation:

Nonmetallic character increases from <em>bottom to top</em> in a Group and from <em>left to right</em> in a period (see image).

Thus, the most nonmetallic elements are at the <em>upper right corner</em> of the Periodic Table.

We ignore the noble gases, because they are quite unreactive.

So, the element that most “wants” an electron is fluorine.

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In buffer solution there is an equilibrium between the acid  HA and its conjugate base A⁻: HA(aq) ⇌ H⁺(aq) + A⁻(aq).

When acid (H⁺ ions) is added to the buffer solution, the equilibrium is shifted to the left, because conjugate base (A⁻) reacts with hydrogen cations from added acid, according to Le Chatelier's principle: H⁺(aq) + A⁻(aq) ⇄ HA(aq). So, the conjugate base (A⁻) consumes some hydrogen cations and pH is not decreasing (less H⁺ ions, higher pH of solution).

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