Rutherford's Experiment,in Which Alpha Particles Were Aimed at a Thin

question 41

Multiple Choice

Rutherford's experiment,in which alpha particles were aimed at a thin piece of gold,led to what understanding?

• A)Neutrons existed.
• B)Electrons existed and have a negative charge.
• C)The number of electrons can be determined by the mass number and atomic number.
• D)Electrons can be promoted to higher energy by absorbing energy.
• E)An atom is mostly empty space.

---

Definitions:

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, often denoted as alpha and used as a threshold for determining statistical significance.

Null Hypotheses

A statistical hypothesis that assumes no significant difference or effect exists within a set of given observations.

Type I Error

The error that occurs when a null hypothesis is incorrectly rejected when it is actually true, often referred to as a "false positive."

Type II Error

The statistical mistake of failing to reject a false null hypothesis. It's also known as the error of accepting a false negative result.