Across
- 1. - The amount of matter in an object, typically in atomic mass units (amu).
- 3. - The smallest unit of an element.
- 5. - A group of atoms bonded together.
- 7. - A combination of symbols showing the elements in a compound.
- 10. - A substance that cannot be broken down into simpler substances.
- 11. - Atoms of the same element with different numbers of neutrons.
- 12. - The outer electrons of an atom that are involved in bonding.
- 14. - Referring to the repeating pattern of chemical properties in elements.
- 16. - A substance produced in a chemical reaction.
- 17. - An atom or molecule with an electric charge due to the loss or gain of electrons.
- 18. - A substance made of two or more elements chemically bonded.
- 19. - A force that holds atoms together in a molecule.
Down
- 2. - A one or two-letter abbreviation representing an element.
- 4. - The central core of an atom, containing protons and neutrons.
- 6. - The electric property of particles, positive, negative, or neutral.
- 8. - A substance that takes part in a chemical reaction.
- 9. - A region around the nucleus where an electron is likely found.
- 13. - A negatively charged particle that orbits the nucleus.
- 15. - A neutral particle found in the nucleus of an atom.
- 16. - A positively charged particle in the nucleus of an atom.