What electron configuration matches an oxygen atom?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

How many orbitals does an s sublevel have?

• 1

• 3

• 5

• 7

How many orbitals does a d sublevel have?

• 1

• 3

• 5

• 7

How many electrons can an d sublevel hold?

• 5

• 10

• 6

• 2

Electrons fill energy levels and sublevels _____ in energy first.

• lower

• higher

Which of the following units is represented simply by a letter?

• orbital

• energy level

• sublevel

• quantum number

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

• Neon
• Magnesium
• Aluminum
• Potassium

Tags

NGSS.HS-PS1-1

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

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

This orbital diagram represents:  

• C
• B
• N
• O

Tags

NGSS.HS-PS1-1

 The diagram above represents two electrons with 

• a. opposite spins.
•  b. the same spin.
• c. different energies.
• d. different energy levels.