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Grade 7 Atoms & Elements Worksheet with Answers

Grade 7 (US) · Year 8 (UK) · Class 7 (India) · Science

Unit 7: Going FurtherAdvanced: Grade 8–9 PreviewNGSS MS-PS1-1Advanced

Protons, neutrons and electrons, and how atoms make up elements. This free middle school worksheet has 16 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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Atoms & Elements

Grade 7 · Science

Score___ / 16

Name

Class

Date

Learning goal: Advanced: Grade 8–9 Preview · NGSS MS-PS1-1

Directions: This worksheet has 3 parts. Read the instructions at the start of each part.

Example

Which particle in an atom has no charge?

Answer: the neutron

Part A

Label the diagram. Use the words in the box.

Word bank

protonnucleusneutronelectron
+++−−−−−−−−1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Match each clue to the right word. Write the letter in the box.

  1. 5Which particle in an atom has a positive charge?
  2. 6Where are protons and neutrons located in an atom?
  3. 7What number on the periodic table tells you the number of protons?
  4. 8What do we call a substance made of only one type of atom?
  5. 9What do we call an atom that has gained or lost electrons?
  6. 10What is the smallest unit of an element that keeps its properties?
  • AIon
  • BProton
  • CElement
  • DAtom
  • EIn the nucleus
  • FAtomic number
Part C

Answer each question. Use full sentences where you can.

  1. 11

    An atom has atomic number 11 and mass number 23. How many neutrons does it have?

  2. 12

    A neutral atom has 8 protons. How many electrons does it have?

  3. 13

    What is the mass number of an atom?

  4. 14

    Where are electrons found in an atom?

  5. 15

    What are the three main particles found in an atom?

  6. 16

    Which particle in an atom has a negative charge?

★ Challenge corner for fast finishers

You are in a closed room with a candle, a match and a lamp. What do you light first?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/7/chemistry_atoms

Answer key (click to show)
  1. 1.nucleus
  2. 2.proton
  3. 3.neutron
  4. 4.electron
  5. 5.B — the proton
  6. 6.E — in the nucleus
  7. 7.F — the atomic number
  8. 8.C — an element
  9. 9.A — an ion
  10. 10.D — an atom
  11. 11.12
  12. 12.8
  13. 13.the number of protons plus neutrons
  14. 14.in shells (energy levels) around the nucleus
  15. 15.protons, neutrons, and electrons
  16. 16.the electron
  17. ★the match (challenge corner)

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How to use this worksheet

  • Works well as a bell-ringer, exit ticket, homework set or quick quiz.
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