According to the collision theory, what two factors must be true for a given collision to successfully create products?

Sufficient concentration and correct mass of particles
Sufficient concentration and correct orientation of particles
Sufficient speed and correct mass of particles
Sufficient speed and correct orientation of particles

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.