Across
- 3. These are the particles in the nucleus that have a neutral charge.
- 5. Positive electrical charge connects with/flows into a _________ charge.
- 7. Atoms that have unstable nuclei are _________.
- 10. The force holding the nucleus together is called the __________ force.
- 13. The term for the number of protons in an atom.
- 15. One or two letters symbolizing one of the elements on the periodic table.
- 17. Atoms of the same element that have different numbers of neutrons.
- 18. This is the large chart of all the elements.
Down
- 1. The center of the atom containing most of its mass.
- 2. Electrons are bound to the nucleus by an ___________ force.
- 4. When matter has a zero charge it is ________
- 6. Negative particles that are even smaller than atoms.
- 8. All matter has a fundamental property called ________
- 9. The part of the nucleus that has a positive charge.
- 11. Atoms of different elements have different ________ of protons.
- 12. __________ atoms have a nucleus that stays together.
- 14. There are 118 of these on the periodic table, and they make up all the matter in the world.
- 16. The term for the amount of protons and neutrons in an atom.
