3.1 ionisation energies Flashcards Preview

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Flashcards in 3.1 ionisation energies Deck (11)
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1
Q

what is ionisation?

A

ionisation is the removal of one or more electrons from an atom

2
Q

what is the first ionisation energy?

A

the first ionisation energy is the energy needed to remove 1 mole of an electron from 1 mole of gaseous atoms

3
Q

what process is ionisation energy?

A

ionisation energy is an endothermic process

4
Q

what is an endothermic process

A

an endothermic process is…

5
Q

what is the equation for the first ionisation energy of oxygen?

A

the equation for the first ionisation energy of oxygen:

O₂(g) → O⁺(g) + e⁻

6
Q

what does a lower ionisation energy mean?

A

a lower ionisation energy means it is easier to form an ion

7
Q

what factors affect ionisation energy?

A

the factors which affect ionisation energy are:

  • atomic radii
  • nuclear charge
  • shielding
8
Q

how does atomic radii affect ionisation energy?

A

the greater the atomic radius, the easier it is to remove electrons as the attraction decreases

9
Q

how does nuclear charge affect ionisation energy?

A

greater nuclear charge
greater attraction
higher ionisation energy

10
Q

how does shielding affect ionisation energy?

A

increased shielding
decreased attraction
lower ionsation energu

11
Q

what does a high ionisation energy have?

A

a high ionisation energy