Isotopes/ Ionisation

Question 1

What is an isotope?

Answer 1

Isotopes are atoms from the same element with the same number of protons but a different number of neutrons.
* different mass numbers*

Question 2

What is ionisation?

Answer 2

Ionisation is when an atom loses (or gains/ in chemistry) an electron to become charged.

Question 3

How does ionisation occur?

Answer 3

1. ) Electron can rush past atom giving electrons in atom energy to move to higher energy level.
2. ) Light absorption (excitation) light gives electron enough energy to move to higher energy level.
   * energy level is further away from nucleus*

Question 4

What happens in light emission?

Answer 4

• The electron loses energy and goes closer to the nucleus. Emitting light.

Question 5

Explain fluroscene with electrons

Answer 5

• When UV light is absorbed, the electrons in the atoms are excited and move to higher energy levels.
• When electrons fall back down (relax), visible light is emitted, which is why fluroscence occurs.