Unit Two Review

Which describes Hund's Rule?

• the electrons will fill orbitals of the lowest energy first

• orbitals can hold a maximum of two electrons with opposite spins

• you must put one electron in each equal energy orbital before doubling up

• orbitals are filled in the highest energy first

Which describes Pauli's Exclusion Principle?

• orbitals can hold a maximum of two electrons with opposite spins

• you must put one electron in each orbital before doubling up

• electrons fill from the lowest to highest energy level

• electrons will fill orbitals of the highest energy first

How many electrons can the fourth energy level hold?

• 2

• 8

• 18

• 32

How many orbitals are in the fourth energy level?

• 4

• 9

• 16

• 32

Which of the following is true of the octet rule?

• nonmetals gain electrons to form an octet

• metals gain electrons to form an octet

• metals and nonmetals gain electrons go form an octet

• metals and nonmetals lose electrons to form an octet

How does electronegativity change as it moves across a period?

• it remains the same

• it increases

• it decreases

• it varies by the element

What is an excited state electron?

• one that has gained energy and moved to a higher orbital

• one that has moved to its least energetic orbital

• one that has gained energy and stayed in its orbital

• an electron that is also light

Tags

NGSS.HS-PS1-2

The second energy level contains...

• s and p orbitals

• s orbitals only

• s, p, d and f orbitals

• s, p, and d orbitals

What element is this 1s²2s²2p⁶3s²3p⁶4s¹3d⁵

• Mn

• Cu

• Zn

• Cr

Which is the correct electron notation for strontium?

• [Ar]5s²

• [Ar]4s²

• [Kr]5s²

• [Kr]5s¹

Tags

NGSS.HS-PS1-1