Part 1 Sample Paper Questions 1 Flashcards
1
Q
Explain why Cs IE < Bi IE [4 marks]
A
- Def ionisation energy
- Bi no. protons > Cs no. protons
- Cs atomic radius > Bi atomic radius
- Weaker electrostatic attraction between nucleus and valence electrons
2
Q
Explain why Fluorine electron affinity > Neon electron affinity [4 marks]
A
- Def electron affinity
- Ne has full outer shell while F has 7 electrons
- Ne stable so requires large amounts of energy to accept electrons
- F only needs 1 electron to complete outer shell
3
Q
Why does radioactivity occur? [1 mark]
A
Binding energy per nucleon falls below critical level. The radioactive process emits matter or energy until nucleus is restablized.
4
Q
What is alpha radiation? [1 mark]
A
He+2
5
Q
Why is alpha radiation emitted? [1 mark]
A
Releases large amounts of energy and mass, fast way to restablize nucleus.
6
Q
How does alpha radiation interact with matter? [1 mark]
A
Strong, destructive effects.
