Atomic Theory and Atomic Structure

Who proposed the plum pudding model of the atom?

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

• Max Planck

What is the charge of a proton?

• +2

• +1

• -1

• 0

Which subatomic particle has a negative charge?

• electron

• positron

• neutron

• proton

What is the atomic number of an element?

• The atomic number of an element is the number of neutrons in the nucleus of an atom.

• The atomic number of an element is the number of electrons in the nucleus of an atom.

• The atomic number of an element is the number of protons in the nucleus of an atom.

• The atomic number of an element is the number of protons and neutrons in the nucleus of an atom.

Who discovered the neutron?

• James Chadwick

• Isaac Newton

• Albert Einstein

• Marie Curie

What is the mass of an electron?

• 1 kg

• 0.0001 kg

• 10^-10 kg

• 9.10938356 × 10^-31 kg

What is the atomic mass unit (amu) used for?

• The atomic mass unit (amu) is used to measure the mass of atoms and subatomic particles.

• The atomic mass unit (amu) is used to measure the volume of atoms and subatomic particles.

• The atomic mass unit (amu) is used to measure the charge of atoms and subatomic particles.

• The atomic mass unit (amu) is used to measure the temperature of atoms and subatomic particles.

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What is the charge of a neutron?

• -1

• 0

• 1

• 2

What is the Bohr model of the atom?

• A model that describes the movement of protons and neutrons within an atom.

• A simplified representation of an atom where electrons orbit the nucleus in specific energy levels or shells.

• A model that explains the behavior of electrons in terms of wave-particle duality.

• A model that suggests that electrons are stationary and do not move around the nucleus.

What subatomic particle determines the name of the element?

• Electron

• Proton

• Neutron

• Boson