Electron Affinity vs. Electronegativity

What's the difference between electronegativity and electron affinity?

• Electronegativity is a measured energy value and electron affinity is a man-made number.
• Electron affinity is a measured energy value and electronegativity is a man-made number.

Define electron affinity.

• The energy it takes to add an electron to an atom.
• The energy it takes to remove an electron from an atom.

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The electron affinity of a metal is positive (endothermic).

• True
• False

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The electron affinity of a nonmetal is negative (exothermic).

• True
• False

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Elements closer to the noble gases have stronger attraction for electrons.

• True
• False

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Which of the following is the least electronegative element?

• oxygen
• potassium
• fluorine
• nitrogen

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NGSS.HS-PS1-1

Which of the following is the most electronegative element?

• nitrogen
• phosphorus
• arsenic
• lithium

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NGSS.HS-PS1-1

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Put these in order of increasing electronegativity:
F, N, B

• B < N < F
• B < F < N
• N < F < B
• F < N < B

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NGSS.HS-PS1-1

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Put these in order of increasing electronegativity:
Se, S, and O

• Se < S < O
• Se < O < S
• O < S < Se
• S < Se < O

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NGSS.HS-PS1-1

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Chlorine and Fluorine are both very electronegative, as they are both missing a single electron from their valence energy level.  Why is Fluorine more electronegative than Chlorine? 

• Fluorine has less energy levels.
• Chlorine has more electrons in its outer shell
• Fluorine has more protons.
• None of these

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NGSS.HS-PS1-1

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