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Grade 11 Electron Shells & Valence Electrons Worksheet with Answers
Grade 11 (US) · Year 12 (UK) · Class 11 (India) · Chemistry
Unit 1: Atoms & PeriodicityElectron ConfigurationNGSS HS-PS1-1
Arranging electrons in shells for the first 20 elements and finding valence electrons. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comElectron Shells & Valence Electrons
Grade 11 · Chemistry
Name
Class
Date
Learning goal: Electron Configuration · NGSS HS-PS1-1
Directions: Read each question carefully and write your answer on the line. Use the diagram to help you.
How many valence electrons does boron (B, atomic number 5) have?
Answer: 3
RememberPeriodic table trends
- 1
How many valence electrons does silicon (Si, atomic number 14) have?
- 2
How many valence electrons does carbon (C, atomic number 6) have?
- 3
How many valence electrons does neon (Ne, atomic number 10) have?
- 4
How many electron shells does a chlorine atom (atomic number 17) have?
- 5
How many valence electrons does argon (Ar, atomic number 18) have?
- 6
How many valence electrons does magnesium (Mg, atomic number 12) have?
- 7
How many valence electrons does beryllium (Be, atomic number 4) have?
- 8
How many electron shells does a phosphorus atom (atomic number 15) have?
- 9
How many electron shells does a hydrogen atom (atomic number 1) have?
- 10
How many electron shells does a carbon atom (atomic number 6) have?
- 11
Write the electron arrangement (electrons per shell) for magnesium, atomic number 12.
- 12
How many valence electrons does oxygen (O, atomic number 8) have?
★ Challenge corner for fast finishers
Why does your breath make fog on a cold window?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/chemistry/11/electron_config
Answer key — Electron Shells & Valence Electrons (Grade 11)
- 1.4
- 2.4
- 3.8
- 4.3
- 5.8
- 6.2
- 7.2
- 8.3
- 9.1
- 10.2
- 11.2, 8, 2
- 12.6
- ★water vapor in your breath condenses on the cold glass
Answer key (click to show)
- 1.4
- 2.4
- 3.8
- 4.3
- 5.8
- 6.2
- 7.2
- 8.3
- 9.1
- 10.2
- 11.2, 8, 2
- 12.6
- ★water vapor in your breath condenses on the cold glass (challenge corner)
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