Exploring Atomic Structure and Discoveries

What is the basic structure of an atom?

• An atom consists of only protons and electrons.

• An atom is made up of molecules and ions.

• An atom is made up of a nucleus (protons and neutrons) and electrons that orbit around it.

• An atom is a solid particle with no internal structure.

Who proposed the plum pudding model of the atom?

• Niels Bohr

• Ernest Rutherford

• Albert Einstein

• J.J. Thomson

What are the three main subatomic particles?

• Neutrons, muons, and quarks

• Protons, electrons, and positrons

• Photons, electrons, and neutrinos

• Protons, neutrons, and electrons

How did Ernest Rutherford's gold foil experiment change the atomic model?

• The experiment showed that atoms are indivisible and uniform.

• Rutherford's experiment revealed the existence of a nucleus, changing the atomic model from the plum pudding model to the nuclear model.

• Rutherford's experiment confirmed the plum pudding model as accurate.

• Rutherford discovered electrons orbiting the nucleus in fixed paths.

What did Rutherford discover about the nucleus?

• Rutherford concluded that the nucleus is a fluid-like substance within the atom.

• Rutherford discovered that the nucleus contains only neutrons and no charge.

• Rutherford discovered that the nucleus is a small, dense center of an atom containing positive charge.

• Rutherford found that the nucleus is a large, empty space in an atom.

How does the modern atomic model differ from Thomson's model?

• The modern atomic model features a solid sphere, while Thomson's model has a central nucleus with electrons orbiting.

• The modern atomic model depicts electrons in fixed orbits, while Thomson's model shows them in a cloud around the nucleus.

• The modern atomic model includes only neutrons, while Thomson's model has a mix of protons and electrons throughout.

• The modern atomic model has a nucleus with protons and neutrons, while Thomson's model has a uniform positive charge with electrons embedded.

What is the charge of a proton?

• +1 elementary charge

• +2 elementary charge

• 0 elementary charge

• -1 elementary charge

What is the charge of an electron?

• -1 elementary charge

• 0 elementary charge

• +1 elementary charge

• -2 elementary charge

What is the mass of a neutron compared to a proton?

• The mass of a neutron is equal to that of a proton.

• The mass of a neutron is less than that of a proton.

• The mass of a neutron is slightly greater than that of a proton.

• The mass of a neutron is much greater than that of a proton.

Who is known for the planetary model of the atom?

• Ernest Rutherford

• J.J. Thomson

• James Chadwick

• Niels Bohr