1.5 - Electron in Atoms(Gen Ed)

What is the term used to describe the arrangement of electrons in various orbitals around the nuclei of atoms?

• Atomic structure

• Electron configurations

• Molecular bonding

• Chemical reactions

Which of the following elements has the electron configuration 1s²2s²2p⁶?

• Helium (He)

• Neon (Ne)

• Oxygen (O)

• Carbon (C)

In electron configurations, what does a superscript represent?

• The number of protons in the nucleus

• The number of electrons in each subshell

• The number of neutrons in the nucleus

• The number of orbitals in an atom

According to the electron configuration table, which element has the configuration 1s²2s²2p¹?

• Lithium (Li)

• Beryllium (Be)

• Boron (B)

• Carbon (C)

What is the role of energy in orbital filling?

• Energy determines the order in which subshells are filled.

• Energy determines the number of electrons in an atom.

• Energy determines the atomic number of an element.

• Energy determines the chemical properties of an element.

What is the maximum number of electrons that each orbital can hold?

• One electron

• Two electrons

• Three electrons

• Four electrons

What must be true about the spins of electrons occupying the same orbital?

• They must have the same spin.

• They must have opposite spins.

• They must have no spin.

• They must have clockwise spins.

In writing electron configurations, in what order should subshells be listed?

• Highest to lowest energy

• Alphabetical order

• Lowest to highest energy

• Random order

Diagram showing electron configuration steps and subshell filling order.

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s

• 1s, 2s, 2p, 3s, 3p, 4s, 4p, 3d, 5s

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5p

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s

What is the reason atoms are more stable when electrons are in the lowest energy orbitals?

• Electrons have more energy in higher orbitals.

• Electrons repel each other more in higher orbitals.

• Electrons have less energy and are more stable in lower orbitals.

• Electrons are closer to the nucleus in higher orbitals.