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Understanding Ionization Energy

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Questions and Answers

What is the definition of ionization energy?

The energy required to break an atom into smaller subatomic particles.

The maximum amount of energy required to add an electron to an atom.

The energy released when an electron is added to an atom.

The minimum amount of energy required to remove the outermost electron from an atom. (correct)

Why are valence electrons the first to be stripped away during ionization?

Because they are closest to the nucleus.

Because they are the furthest from the nucleus and influenced the least by it. (correct)

Because they have a stronger negative charge.

Because they have the highest energy level.

How does ionization energy change as more electrons are removed from an atom?

It decreases due to reduced electron-electron repulsion.

It remains constant regardless of the number of electrons removed.

It fluctuates depending on the electron's energy levels.

It increases because it becomes harder to remove electrons. (correct)

What unit is ionization energy typically measured in?

Kilojoules per mole Signup and view all the answers

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

Because it has lost electrons and now has a greater positive charge. Signup and view all the answers

What happens to an atom's ionization energy as its positively charged influence on electrons increases?

It increases because valence electrons are more tightly held. Signup and view all the answers

In the formula for ionization energy, what does 'X' represent?

'X' represents the atom or molecule Signup and view all the answers

Why does ionization energy increase across a period?

As a result of increasing atomic numbers from left to right Signup and view all the answers

What factor contributes to the decrease in ionization energy down a group?

Increase in the distance between outermost electrons and the nucleus Signup and view all the answers

In which direction does ionization energy typically increase within a period?

From left to right Signup and view all the answers

What role does the number of protons play in determining ionization energy?

It increases ionization energy Signup and view all the answers

How does the number of electron shells impact ionization energy?

It increases ionization energy Signup and view all the answers

Why do elements going down a group have lower ionization energy?

Because of an increase in electron shells Signup and view all the answers

What effect does the distance between outermost electrons and the nucleus have on ionization energy?

Decreases it Signup and view all the answers

How does the strength of positive force between nucleus and outermost electrons influence ionization energy?

Increases it Signup and view all the answers