Half-life and collision theory

What is half life?

It is the time required for ahlf of the nuciei in a radioactive sample to decay

What is collision theory/collision model?

Particles in reactantrs move around and collide witheachother. Most collisions don’t result in anything but sometimes, they collide and cause the bonds in exsiting moleclues to make new molecules.

What is an effective collision are the must haves to have one?

It is when a collision makes a new product, and to have one there are two must haves:

1. proper geometry

2. minimum activation energy

What are the factors affecting rates and collision theory?

1. concentration

2. surface area (size of solid particles

3. temeperature of reactants

4. nature of reactants

5. presense of a catalyst

What are reaction mechanisms?

They are a series of simple steps that ultimatelyes lead from initial reactants to final products of a reaction

What two steps need to followed for a mechanism to be valid?

1. account for the experiementally determined rate law

2. be consistant wirth the stoichiometry of the overall or net reaction

What is molecularity?

It is the numbers of reactants involved in an elemantary step