Across
- 2. The bond formed when elements share electrons.
- 4. Organic compounds found in all living cells.
- 6. A particle that contains more than one atom.
- 9. A compound that contains carbon-carbon and carbon-hydrogen bonds.
- 13. A property of water that occurs when the adhesion of water molecules to a surface is stronger than cohesion between the molecules.
- 16. A compound composed of carbon, hydrogen, and oxygen atoms.
- 22. The spontaneous release of material from the nucleus of radioactive isotopes.
- 24. Anything that occupies space and has mass.
- 27. Number The number of protons in the nucleus of a particular element.
- 29. A weak chemical bond that forms when hydrogen atoms that are covalently bonded to one atom are attracted to another atom on another molecule.
- 30. A molecule in which one side is more positive and the other side is more negative.
- 31. Number A measurement of the total number of protons and neutrons in an element.
Down
- 1. The time it takes for one-half of an original radioactive parent atom to decay.
- 3. A substance that contributes hydrogen ions to a solution.
- 5. A nucleic acid, the genetic material that contains the code for reproducing the components of the next generation, and which organisms pass on to their offspring.
- 7. A law of nature stating that matter cannot becreated or destroyed; it can only change form.
- 8. A molecule containing more than one element.
- 10. A reaction that occurs when atoms separate from molecules or recombine with other molecules.
- 11. A property of water that results from the cohesion of water molecules at the surface of a body of water and that creates a sort of skin on the water's surface.
- 12. An increase in the acidity of the oceans.
- 14. A nucleic acid that translates the code stored in DNA, which makes possible the synthesis of proteins.
- 15. The number that indicates the relative strength of acids and bases in a substance.
- 17. The substance that contributes hydroxide ions to a solution.
- 18. Table A chart of all chemical elements currently known, organized by their properties.
- 19. A critical component of living organisms made up of a long chain of nitrogen-containing organic molecules known as amino acids.
- 20. A substance composed of atoms that cannot be broken down into smaller, simpler components.
- 21. A measurement of the amount of matter an object contains.
- 23. A compound that does not contain the element carbon or contains carbon bound to elements other than hydrogen.
- 25. A chemical bond between two ions of opposite charges.
- 26. The smallest particle that can contain the chemical properties of an element.
- 28. Atoms of the same element with different numbers of neutrons.