Exploring Atomic Structure and Reactions

What is the atomic number of Uranium-235?

• 92

• 235

• 143

• 238

Which of the following particles are found in the nucleus of an atom?

• Electrons

• Protons and Neutrons

• Protons and Electrons

• Neutrons and Electrons

Tags

NGSS.MS-PS1-1

What is the mass defect in nuclear physics?

• The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons

• The mass of an electron

• The mass of a proton

• The mass of a neutron

Tags

NGSS.MS-PS1-1

Which equation is used to calculate the energy released in nuclear reactions?

Tags

NGSS.HS-PS1-8

What type of nuclear reaction powers the sun?

• Fission

• Fusion

• Alpha decay

• Beta decay

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

Which principle states that no two electrons in an atom can have the same set of four quantum numbers?

• Aufbau principle

• Hund’s rule

• Pauli exclusion principle

• Heisenberg uncertainty principle

What is the process called when a solid changes directly into a gas?

• Condensation

• Evaporation

• Sublimation

• Deposition

Tags

NGSS.MS-PS1-4

Which scientist is known for the model of the atom that includes a nucleus surrounded by electrons in specific orbits?

• Democritus

• Dalton

• Rutherford

• Bohr

What is the term for the energy required to remove an electron from an atom in the gas phase?

• Ionization energy

• Electron affinity

• Electronegativity

• Binding energy

Which of the following is an example of a chemical change?

• Melting ice

• Dissolving sugar in water

• Burning wood

• Boiling water

Tags

NGSS.MS-PS1-2