Worksheet: Electron Shells

In this worksheet, we will practice describing the filling of shells by electrons and the relationship between electron shells and the periodic table.

Q1:

How many electrons are in the outermost electron shell of fluorine?

Q2:

Which electronic configuration describes how electrons are arranged in the shells of a chlorine ion?

  • A 2 , 8 , 8
  • B 2 , 8 , 7
  • C 2 , 8 , 6
  • D 2 , 8
  • E 2 , 7

Q3:

Which electronic configuration describes how electrons are arranged in the shells of a potassium atom?

  • A 2 , 8 , 8 , 1
  • B 2 , 8 , 8 , 8 , 1
  • C 2 , 8 , 9
  • D 8 , 8 , 3
  • E 2 , 8 , 7 , 2

Q4:

How many electrons are in the outermost electron shell of boron?

Q5:

Which electronic configuration describes how electrons are arranged in the shells of a sodium ion?

  • A 2 , 1
  • B 2 , 8 , 1
  • C 2 , 8 , 2
  • D 2 , 8 , 8 , 5
  • E 2 , 8

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