Quizz Struktur Atom

What is the basic unit of matter?

• molecule

• cell

• atom

• electron

Who proposed the first atomic theory?

• Albert Einstein

• Niels Bohr

• Erwin Schrödinger

• John Dalton

What are the three main subatomic particles?

• Protons, quarks, and neutrinos

• Protons, neutrons, and electrons

• Neutrons, electrons, and muons

• Protons, electrons, and positrons

What is the charge of a proton?

• +1 elementary charge

• +2 elementary charge

• 0 elementary charge

• -1 elementary charge

What did Rutherford's gold foil experiment demonstrate?

• Electrons are located in the nucleus of an atom.

• The existence of a small, dense nucleus in atoms.

• All atoms have the same size and mass.

• Atoms are mostly empty space with no structure.

What is the significance of the Bohr model of the atom?

• The Bohr model is significant for introducing quantized energy levels in atoms, explaining atomic stability and spectral lines.

• The Bohr model was the first to propose the existence of protons.

• The Bohr model describes the nucleus of the atom.

• The Bohr model explains chemical bonding between atoms.

How do isotopes of an element differ?

• Isotopes differ in the number of neutrons and atomic mass.

• Isotopes differ in the number of protons and electrons.

• Isotopes have the same atomic mass but different chemical properties.

• Isotopes are only found in radioactive elements.

What is the role of electrons in chemical bonding?

• Electrons only repel each other and do not form bonds.

• Electrons are solely responsible for the mass of an atom.

• Electrons play a crucial role in forming chemical bonds by either being shared or transferred between atoms.

• Electrons are not involved in chemical bonding at all.

What is the quantum mechanical model of the atom?

• Electrons are fixed particles orbiting the nucleus in defined paths.

• The quantum mechanical model of the atom describes electrons as wave functions and incorporates principles of quantum mechanics.

• The quantum mechanical model only applies to large objects like planets.

• The atom is a solid sphere with no internal structure.

How has the understanding of atomic structure evolved over time?

• Electrons are located in fixed orbits around the nucleus without any uncertainty.

• The atomic model has remained unchanged since the 19th century.

• The understanding of atomic structure has evolved from Dalton's solid sphere model to the quantum mechanical model.

• Atoms are indivisible and cannot be split apart.