Chapter 5. Section 1-3

What is the maximum number of electrons that can be present in each principal energy level of hydrogen?

• n

• n²

• 2n

• 2n²

What is the lowest energy state of an atom called?

• the ground state

• the excited state

• the excited state

• the excited state

How many electrons can the first orbital contain?

• 1

• 2

• 3

• 4

What is the electron configuration for tin (Sn)?

• [Kr]5s²3d¹⁰3f¹⁴5p⁴

• [Kr]5s²3d¹⁰4d¹⁴5p⁴

• [Kr]5s²3d¹⁰4f¹⁴5p²

• [Kr]5s²4d¹⁰5p²

What is an electron dot structure?

• An element symbol surrounded by dots representing its valence electrons.

• An element symbol surrounded by dots representing its valence electrons.

• An element symbol surrounded by dots representing its valence electrons.

• An element symbol surrounded by dots representing its valence electrons.

The Heisenberg uncertainty principle states that ____________

• no two electrons in the same atom can have the same set of four quantum numbers

• two atoms of the same element must have the same number of protons

• it is impossible to simultaneously know the precise position and velocity of a particle

• electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set

The ground state of hydrogen corresponds to the _________.

• zeroeth energy level

• first energy level

• second energy level

• highest energy level

Which of the following statements is true?

• Each set of d orbitals contains seven orbitals.

• Each set of d orbitals can hold a maximum of 14 electrons.

• The first energy level contains only s and p orbitals.

• All s orbitals are spherically shaped.

The principle that states each electron occupies the lowest energy orbital available is the ______________.

• Aufbau principle

• Uncertainty principle

• Exclusion principle

• Photoelectric principle

The valence orbitals in an atom are the ___________.

• innermost orbitals

• second energy level

• d orbitals

• outermost orbitals