Question

part 4 - homework/independent practice

1. what conclusion was a direct result of the gold foil experiment?
2. an atom is mostly empty space with a dense, positively - charged nucleus.
3. an atom is composed of at least three types of subatomic particles.
4. an electron has a positive charge and is located inside the nucleus.
5. an electron has properties of both waves and particles.
6. subatomic particles can usually pass undeflected through an atom because the volume of an atom is composed of:
7. an uncharged nucleus 3) neutrons
8. largely empty space 4) protons
9. compared to the entire atom, the nucleus of the atom is:
10. smaller and contains most of the atoms mass
11. smaller and contains little of the atoms mass
12. larger and contains most of the atoms mass
13. larger and contains little of the atoms mass
14. describe, in terms of atomic composition, one way in which the rutherford model agrees with the thomson model of the atom.
15. state one conclusion about the internal structure of the atom that resulted from the gold foil experiment.
16. explain, in terms of subatomic particles, why john daltons original proposed statement “atoms are indivisible and cannot be destroyed or broken down into smaller parts.” is no longer accepted

Explanation:

1. In the gold - foil experiment, it was found that most of the alpha particles passed through the gold foil, indicating that an atom is mostly empty space with a dense, positively charged nucleus.
2. Subatomic particles can pass undeflected through an atom because an atom is largely empty space.
3. The nucleus is smaller in size compared to the whole atom but contains most of the atom's mass.
4. Both the Rutherford and Thomson models agree that an atom contains electrons. Thomson's model was the "plum - pudding" model where electrons were embedded in a positively charged sphere.
5. One conclusion from the gold - foil experiment is that an atom has a small, dense, positively charged nucleus.
6. The discovery of subatomic particles like protons, neutrons, and electrons shows that atoms are not indivisible as Dalton thought.

Answer:

1. 1) An atom is mostly empty space with a dense, positively charged nucleus.
2. 2) Largely empty space
3. 1) smaller and contains most of the atom’s mass
4. Both models agree that atoms contain electrons.
5. An atom has a small, dense, positively - charged nucleus.
6. The discovery of subatomic particles (protons, neutrons, electrons) shows that atoms can be broken down into smaller parts.