Electron Affinity

The energy released when an electron is ADDED is the....

• Atomic Radius

• Electronegativity

• Electron Affinity

• Ionization Energy

Which noble gas has the HIGHEST electron affinity?

• He

• Ne

• Xe

• Rn

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NGSS.HS-PS1-1

Which of the following has the LOWEST electron affinity?

• Na

• B

• F

• Li

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How is electron affinity described?

• The ability for an atom to lose an electron.

• The likelihood of an atom to gain an electron.

• How large or small an atom is.

• The number of protons in the nucleus of an atom.

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NGSS.HS-PS1-2

Which one of the following would result in the greatest electron affinity?

• A large atom, with a weak positive force in the nucleus.

• A large atom, with a strong positive force in the nucleus.

• A small atom, with a weak positive force in the nucleus.

• A small atom, with a strong positive force in the nucleus.

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NGSS.HS-PS1-1

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Which statement is correct concerning electron affinity of atoms?

• It decreases left to right across a period and increases top to bottom in a group

• It increases left to right in a period and decreases top to bottom in a group

• It decreases left to right in a period and decreases top to bottom in a group

• It increases left to right in a period and increases top to bottom in a group

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As you move from the top of a column (group) to the bottom of the column (group) what happens to electron affinity?

• electron affinity increases

• electron affinity decreases

• electron affinity stays the same

• more information needed to answer this question

Answer explanation

The positive force of the nucleus as felt by the outside of the atom decreases as you move down a group because the outer electrons are added to increasingly distant energy levels.

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NGSS.HS-PS1-2

Of the given elements, which will have the highest electron affinity?

• phosphorus (P)

• arsenic (As)

• sulfur (S)

• oxygen (O)

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What is the definition of electron affinity?

• The energy change when an electron is added to a neutral atom in the gaseous state.

• The energy required to remove an electron from a neutral atom.

• The tendency of an atom to attract electrons in a chemical bond.

• The size of an atom's electron cloud.

Which element is likely to have the highest electron affinity?

• Fluorine (F)

• Chlorine (Cl)

• Bromine (Br)

• Iodine (I)

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