ELECTRON CONFIGURATION

What is the electron configuration of an atom?

• The arrangement of electrons in the nucleus

• The arrangement of protons in the nucleus

• The distribution of electrons in electron shells

• The distribution of neutrons in the nucleus

What does the atomic number of an element represent?

• Number of protons                      

                           

• Number of neutrons

• Number of electrons

• Atomic mass

How many neutrons are in an atom with an atomic number of 14 and a mass number of 28?

• 14

• 28

• 42

• 56

The number of neutrons in an atom can be calculated by:

• Atomic number     

• Mass number minus protons

• Atomic number minus mass number

• Atomic mass

What is the electron configuration of a chlorine ion (Cl^-) with atomic number 17?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶    

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵    

• 1s² 2s² 2p⁶ 3s² 3p5

• 1s² 2s¹