Across
- 6. A pure substance made of two or more different elements that are chemically bonded together
- 7. the large, complex molecules that are essential for life
- 9. a living organism's most basic carbohydrate unit, it is the fundamental building block for all larger, more complex sugars, starches, and fibers
- 11. molecules that repel water and don't mix with it
- 12. a different version of a chemical element that has the same number of protons but a different number of neutrons
- 13. sugar molecules, a major source of energy for the body
- 14. any group of two or more atoms chemically bonded together
- 16. a pure, basic chemical substance made of only one type of atom
- 18. a positively charged particle found in the nucleus of every atom
- 20. a very large molecule made of many smaller, linked sugar units
- 21. an atom or molecule that has an electric charge
- 22. distinct energy levels or orbital regions where electrons are found orbiting the atomic nucleus
- 24. organic molecules that are the building blocks of proteins
- 27. complex molecules made up of smaller building blocks called amino acids
- 29. a chemical that can donate a hydrogen ion (or proton) in a solution
- 30. a substance that can accept hydrogen ions
- 32. a substance that increases the rate of a chemical reaction without being consumed or permanently changed by the reaction itself
- 33. a waxy substance found in the blood that plays an essential role in the body
Down
- 1. the minimum amount of energy needed to start a chemical reaction
- 2. substance that is "water-loving" and can easily mix with, dissolve in, or be attracted to water
- 3. a weak attraction that forms between a hydrogen atom and a highly electronegative atom
- 4. a fundamental, negatively charged particle found in all atoms that orbits the atom's nucleus
- 5. the surface on which an organism lives or the specific molecule an enzyme acts upon during a chemical reaction
- 8. 0-to-14 measure of how acidic or basic a substance is
- 10. a process where substances, called reactants, transform into new and different substances
- 15. a strong chemical bond formed by the electrostatic attraction between oppositely charged ions
- 16. proteins that act as biological catalysts, speeding up the chemical reactions
- 17. long chains made of smaller, repeated subunits
- 19. a molecule that contains carbon, specifically within a carbon-based structure, often including hydrogen
- 23. a diverse group of molecules, like fats and waxes
- 24. the tiny, fundamental building block of all matter
- 25. a chemical bond where two atoms share electrons to form a stable molecule
- 26. essential biological molecules that act as the blueprints for life
- 28. a covalent chemical bond that links two amino acids together
- 31. a subatomic particle with no electric charge