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Ionization Energy Concept

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Questions and Answers

What is ionization energy?

The energy released when an electron is added to an atom

The minimum energy needed to remove a valence electron (correct)

The amount of energy required to add a valence electron

The energy released when an electron is removed from an atom

Why does ionization energy increase across a period?

As the number of electron shells increases (correct)

Because the distance between the nucleus and electrons decreases

Due to a decrease in the number of protons

Because the negative force on electrons weakens

Which element would likely have the highest ionization energy?

Neon (Group 8a) (correct)

Sodium (Group 1)

Phosphorus (Group 5)

Oxygen (Group 6)

Why does ionization energy decrease going down a group?

Increase in the number of electron orbitals Signup and view all the answers

Which element would have lower ionization energy, lithium or cesium?

Cesium Signup and view all the answers

What is the definition of ionization energy?

The minimum amount of energy required to remove the outermost electron in the electron cloud of an atom. Signup and view all the answers

Why are valence electrons more easily removed compared to inner electrons?

Valence electrons are more influenced by the atom's nucleus. Signup and view all the answers

Which factor causes it to become increasingly difficult to remove electrons from an atom?

Decreasing positive charge on the nucleus. Signup and view all the answers

How is ionization energy measured?

In kilojoules per mole. Signup and view all the answers

Why does an ion with a higher positive charge have a tighter hold on its remaining electrons?

It gains more protons in its nucleus. Signup and view all the answers