Modern Atomic Theory

What atom matches this electron configuration?1s2 2s2 2p6 3s2

• Neon
• Magnesium
• Aluminum
• Potassium

Which is the electron configuration for an oxygen atom?

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2s2 2p6 3s2 3p6

What is the maximum number of electrons that an orbital can have?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

How many valence electrons are represented here? 1s2 2s2 2p3

• 7

• 5

• 2

• 8

What shell contains d sublevels?

• 1

• 2

• 3

• all sublevels

How many p orbitals are there in a sublevel?

• 2

• 1

• 4

• 3

How many electrons can the d sublevel hold?

• 8

• 10

• 2

• 4

What is this element?1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 (only the last subshell matters in identifying an element!)

• Argon
• Krypton
• Selenium
• Bromide

What element matches this electron configuration?[Ne] 3s2 3p1

• Gallium (Ga)
• Aluminum (Al)
• Phosphorus (P)
• Arsenic (As)

Which of the following could be represented by this orbital notation?

• N
• Si
• C
• P