Exploring Atomic Structure and Quantum Theory

What determines the elemental identity of an atom?

• Atomic mass

• Number of protons

• Number of electrons

• Number of neutrons

What is the role of neutrons in the nucleus?

• They repel protons

• They act as nuclear glue

• They provide a negative charge

• They determine the atomic number

How is the mass number of an atom calculated?

• Difference between protons and neutrons

• Sum of protons and neutrons

• Sum of neutrons and electrons

• Sum of protons and electrons

What is an isotope?

• Atoms with the same number of protons but different number of neutrons

• Atoms with the same number of neutrons but different number of protons

• Atoms with the same atomic mass but different atomic numbers

• Atoms with the same number of electrons but different number of protons

What is the charge of an atom with more electrons than protons?

• Negative

• Neutral

• It depends on the number of neutrons

• Positive

What does the Pauli exclusion principle state?

• Electrons fill orbitals one at a time before pairing

• Only two electrons can occupy an orbital, and they must have opposite spins

• Electrons have a fixed amount of energy

• Electrons fill the lowest energy orbitals first

How can the periodic table help in writing electron configurations?

• It lists the isotopes of each element

• It provides the atomic mass

• It indicates the number of neutrons

• It shows the order of orbital filling

What are noble core electrons?

• Electrons in the outermost shell

• Electrons that are involved in bonding

• Electrons with the same configuration as a noble gas

• Electrons that have a positive charge

Which quantum number indicates the shape of an orbital?

• Spin quantum number

• Magnetic quantum number

• Angular momentum quantum number

• Principal quantum number

What does the magnetic quantum number specify?

• The spin of the electron

• The energy level of the electron

• The shape of the orbital

• The axis on which the orbital is oriented