Across
- 4. Atoms of the same element that have the same number of protons and electrons but a different number of neutrons.
- 7. The element found in almost all livign organisms.
- 8. The horizontal rows on the periodic table.
- 9. Chemical bond that forms when electrons are shared.
- 10. Bond that forms when an electron is donated to the other atom.
- 13. The minimum amount of energy needed for a chemical reaction to take place.
- 16. A mixture where the components remain distinct.
- 18. A pure substance that cannot be broken down into other substances by physical or chemical means.
- 19. Substance that lowers activation energy.
- 23. A mixture that appears to be a single substance.
- 24. The substances formed form reactants.
- 25. Anything that has mass or weight.
Down
- 1. The vertical rows on the periodic table.
- 2. The particle of an atom with a positive charge.
- 3. A combination of two or more pure substances that are not chemically cobined.
- 5. A mixture that has a uniform composition throughout.
- 6. A pure substance formed when two or more different elements join/bond together chemically.
- 8. The table we look at while classifying elements.
- 11. Biological catalyst found in livign organisms.
- 12. The study of matter.
- 14. The particle of an atom that has no charge or is neutral.
- 15. The elements mixed together to form a new substance.
- 17. The negative charge particle of an atom.
- 20. is the substance beign disolved in another substance.
- 21. The substance in which the solute is dissolved.
- 22. The building block of matter made up of a nucleus and electron cloud.