I thought i was done but I am confused on these two.

1. In a natom electrons are located in energy levels that are a certain distance from the nucleus. I put rutherford.

and I am still left with atoms are small hard particles - wave - rutherford -democrius - thompson

#1. not Rutherford. I posted this before, Rutherford had no idea where the electrons were. Go back and read some of my responses.

#2. I still don't know anything about a hard nucleus. If you substituted the word compact for hard I would buy Rutherford. (Again, note the correct spelling for Thomson and Democritus.)

To determine the correct answer for the first question, you will need to recall the experiment conducted by Ernest Rutherford. Rutherford's gold foil experiment helped in understanding the structure of an atom. He bombarded a thin gold foil with alpha particles (helium nuclei) and observed their scattering pattern.

During the experiment, Rutherford discovered that most of the alpha particles passed straight through the foil, while a small fraction of particles were deflected at varying angles. Based on these observations, Rutherford proposed that atoms have a small and dense positively charged center called the nucleus, which contains most of the atom's mass. He also concluded that electrons orbit the nucleus at fixed energy levels.

So the correct answer to your first question is indeed Rutherford. The electrons in an atom are located in energy levels at certain distances from the nucleus, as proposed by Rutherford.

Moving on to your second question, "atoms are small hard particles - wave - Rutherford - Democritus - Thompson." Let's break down the answer options:

- Democritus: Democritus was an ancient Greek philosopher who first proposed that matter is composed of small, indivisible particles called atoms. His atomic theory laid the foundation for our current understanding of atoms.

- Thompson: J.J. Thompson conducted the cathode ray tube experiment and discovered that atoms consist of even smaller negatively charged particles called electrons. His proposed model of the atom, known as the "plum pudding model," suggested that electrons are embedded in a positively charged sphere.

Given the options provided, the correct answer for the second question would be Democritus. He was the one who initially theorized that atoms are small hard particles.

In summary:

1. The correct answer is Rutherford because he proposed that electrons in an atom are located in energy levels at certain distances from the nucleus.

2. The correct answer is Democritus because he put forth the concept that atoms are small hard particles.