Understanding Ionization Energy

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What does ionization energy represent?

The energy needed to move electrons within an atom
The maximum energy needed to remove the outermost electron of an atom
The energy needed to add electrons to an atom
The minimum energy needed to remove the outermost electron of an atom (correct)

Why are valence electrons most easily removed from an atom?

They are influenced the least by the nucleus (correct)
They are closest to the nucleus
They have the highest energy levels
They are negatively charged

How is ionization energy measured?

Kilojoules per mole (correct)
Grams per liter
Moles per liter
Liters per kilojoule

What does a more positively charged ion imply about its hold on electrons?

It has a tighter hold on its remaining electrons (A) Signup and view all the answers

Why does it become increasingly difficult to remove more electrons from an atom?

Because as electrons are stripped away, it requires more energy to remove them (D) Signup and view all the answers

What does the formula for ionization energy represent?

"X" as the atom or molecule, "X+" as the positively charged ion, and "e-" as the removed electron (C) Signup and view all the answers

What role do valence electrons play in ionization energy?

They are most easily removed due to their position in an atom's electron cloud (C) Signup and view all the answers

Why does ionization energy increase across a period?

As the number of protons in the nucleus increases, they pull electrons more tightly around the nucleus. (B) Signup and view all the answers

What is the primary reason for the observed decrease in ionization energy down a group on the periodic table?

A decrease in the number of electron shells or orbitals. (D) Signup and view all the answers

In relation to ionization energy, what effect does an increase in the number of protons within an element's nucleus have?

Strengthens the positive charge attracting electrons tightly. (A) Signup and view all the answers

Why do elements going down a group on the periodic table have lower ionization energy?

The positive force felt by the outermost electron from the nucleus weakens. (D) Signup and view all the answers

How does moving from left to right within a period affect ionization energy?

Increases because of a stronger attraction between protons and electrons. (C) Signup and view all the answers

What role do electron shells play in determining ionization energy?

They decrease ionization energy by increasing the distance between electrons and nucleus. (A) Signup and view all the answers

How does the atomic number correlate with ionization energy?

Increasing atomic numbers result in higher ionization energy within a group. (D) Signup and view all the answers

In terms of ions, how does ionization energy relate to their formation?

Ions need more energy to form when ionization energy is low. (B) Signup and view all the answers

Understanding Ionization Energy

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