U1-2-2 - Ionisation Energy

Question 1

1^st ionisation energy is the energy required to ________ from one mole of free gaseous atoms.

Answer 1

1^st ionisation energy is the energy required to remove one mole of electrons from one mole of free gaseous atoms.

Question 2

1^st ionisation energy is the energy required to remove one mole of electrons from _______ of free gaseous atoms.

Answer 2

1^st ionisation energy is the energy required to remove one mole of electrons from one mole of free gaseous atoms.

Question 3

1^st ionisation energy is the energy required to remove one mole of electrons from one mole of __________ atoms.

Answer 3

1^st ionisation energy is the energy required to remove one mole of electrons from one mole of free gaseous atoms.

Question 4

What is wrong with this ionisation equation?

Answer 4

Atoms must be free (just F, not F₂)

Question 5

What is wrong with this ionisation equation?

Answer 5

Atoms must be gaseous (g, not l)

Question 6

Why does 1st IE increase going across a period?
1. ________________________________
2. Outer e⁻ is more strongly attracted to nucleus

Answer 6

Increasing nuclear charge

Question 7

Why does 1st IE increase going across a period?
1. Increasing nuclear charge
2. Outer e⁻ is ________________

Answer 7

more strongly attracted to the nucleus

Question 8

Why does 1st IE decrease going down group 1?
1. Outer e⁻ is ________________________
2. Outer e⁻ is less strongly attracted to nucleus

Answer 8

more screened

Question 9

Why does 1st IE decrease going down group 1?
1. Outer e⁻ is more screened
2. Outer e⁻ is __________________________

Answer 9

less strongly attracted to nucleus

Question 10

Sodium has the electron arrangement 2,8,1. Why is the 2nd IE greater than the 1st IE?
1. 2^nd electron is removed from a
2. 2^nd electron is less screened (than the 1^st)

Answer 10

removed from a full/stable electron shell

Question 11

Sodium has the electron arrangement 2,8,1. Why is the 2nd IE greater than the 1st IE?
1. 2^nd electron is removed from a full/stable electron shell
2. 2^nd electron is ____________ (than the 1^st)

Answer 11

less screened