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Periodic Puzzle
20
atomic number : the number of protons in the nucleus of an atom.
atomic mass : the mass number.
atom : the basic unit of a chemical element.
element : a part or aspect of something abstract, especially one that is essential or characteristic.
proton : a stable subatomic particle occurring in all atomic nuclei.
neutron : a subatomic particle of about the same mass as a proton but without an electric charge.
electron : a stable subatomic particle with a charge of negative electricity.
valance electrons : a valence electron is an electron that is associated with an atom.
Hydrogen :
Iron : Fe
Gold : Au
Copper: Cu
Helium : He
Nitrogen : N
Carbon : C
Tin : Sn
Lead : Pb
Compound : A mixture of two elements.
Neon : Ne
Boron : B
Periodic Puzzle
Across:4. | a valence electron is an electron that is associated with an atom. | 5. | the mass number. | 6. | Fe | 7. | A mixture of two elements. | 9. | Ne | 10. | a subatomic particle of about the same mass as a proton but without an electric charge. | 11. | the basic unit of a chemical element. | 12. | | 14. | Cu | 15. | B | 16. | a stable subatomic particle occurring in all atomic nuclei. | 18. | a stable subatomic particle with a charge of negative electricity. |
| | Down:1. | Au | 2. | a part or aspect of something abstract, especially one that is essential or characteristic. | 3. | the number of protons in the nucleus of an atom. | 8. | Pb | 13. | N | 14. | C | 17. | He | 19. | Sn |
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PuzzleFast.com, Noncommercial Use Only
Periodic Puzzle
Across:4. | a valence electron is an electron that is associated with an atom. | 5. | the mass number. | 6. | Fe | 7. | A mixture of two elements. | 9. | Ne | 10. | a subatomic particle of about the same mass as a proton but without an electric charge. | 11. | the basic unit of a chemical element. | 12. | | 14. | Cu | 15. | B | 16. | a stable subatomic particle occurring in all atomic nuclei. | 18. | a stable subatomic particle with a charge of negative electricity. |
| | Down:1. | Au | 2. | a part or aspect of something abstract, especially one that is essential or characteristic. | 3. | the number of protons in the nucleus of an atom. | 8. | Pb | 13. | N | 14. | C | 17. | He | 19. | Sn |
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© 2016
PuzzleFast.com, Noncommercial Use Only