Atomic Structure: Ionising energy.

Question 1

To remove an electron from an atom what is required?

Answer 1

= energy.

Question 2

What is the first ionising energy?

Answer 2

= the first ionising energy is the energy required to remove one mole of an electron from one mole of a gaseous atom.

e.g: Na + (g) –> Na^1(g)+ + e^-

Question 3

What is the second ionising energy?

Answer 3

= the second ionising energy is the energy required to remove 1 mole of an electron from one mole of a gaseos 1+ ion.

e.g: N+ (g) –> N^2+ + e^-

Question 4

How did Bohr discover how many electrons could fit in a certain energy level?

Answer 4

= removing sucessive electrons + working out how much energy was needed.
= discovered that where there was big jumps, it was a new shell.

Question 5

What is sucessive ionisation energy?

Answer 5

= removing sucessive electrons
= measuring the ionisation energy each time.

Question 6

Why is less energy needed to remove electrons from the outer shell?

Answer 6

= shells away from the nucleus (at the beggining of the graph), requires less energy as there is more sheilding from the energy shells and great distance from the nuclues.

Question 7

Why does successive ionisation energy is greater?

Answer 7

the electrons is being pulled away from a positive species and is slightly closer to the nucleus.