Electrons & Electron Configuration

How many valence electrons does an oxygen atom have?

• 4

• 6

• 8

• 2

What is the significance of valence electrons in chemical bonding?

• They are responsible for the color of the atom.

• They determine how an atom can bond with other atoms.

• They are involved in the nucleus of the atom.

• They have no effect on chemical reactions.

What is the maximum number of electrons that can occupy a single subshell?

• 2n², where n is the principal quantum number.

• n², where n is the principal quantum number.

• 2n, where n is the principal quantum number.

• n, where n is the principal quantum number.

What is the electron configuration for an atom with 10 electrons?

• 1s² 2s² 2p⁶

• 1s² 2s² 2p⁵

• 1s² 2s² 2p⁷

• 1s² 2s² 2p⁴

What is the electron configuration for a sodium atom?

• 1s² 2s² 2p⁶ 3s¹

• 1s² 2s² 2p⁶ 3p¹

• 1s² 2s² 3s²

• 1s² 2s² 2p⁶ 3s² 3p¹

True or False: The dot diagram for an atom represents its valence electrons.

• True

• False

• Sometimes

• Only for certain elements

True or False: The electron configuration of an atom describes the distribution of electrons in its orbitals.

• True

• False

• Partially True

• Not Applicable

What is the electron configuration for a fluorine atom?

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁵

• 1s² 2s² 2p⁶

• 1s² 2s² 2p³

What is the electron configuration for an atom with 12 electrons?

• 1s² 2s² 2p⁶ 3s² 3p²

• 1s² 2s² 2p⁶ 3s² 3p¹

• 1s² 2s² 2p⁶ 3s² 3p³

• 1s² 2s² 2p⁶ 3s² 3d²

What is the shape of the p subshell?

• Spherical

• Dumbbell-shaped

• Cylindrical

• Triangular