Across
- 3. the part of the nucleus of an atom that has no electrical charge
- 5. a sugar which is the main source of quick available energy for a cell
- 8. a compound containing carbon, hydrogen, and oxygen that is an important source of food and energy
- 10. positively charged ion
- 14. the process by which a chemical compound loses water molecules or the proportion of hydrogen and oxygen atoms present in water
- 15. a large molecule such as that of a protein or polymer, made up of smaller components connected to one another
- 17. the monomers that make up proteins
- 19. a simple molecule that can combine with other molecules to form a polymer
- 20. a compound consists of large molecules made of many chemically bonded smaller identical molecules
Down
- 1. the part of the nucleus of an atom that has a positive electrical charge
- 2. catalyze biochemical reactions, interact with their reactants
- 4. a part of an atom that moves around the nucleuscentre and has a negative electrical charge
- 6. caused by H bond between H2O molecules, "water molecules are sticky to each other"
- 7. a strong interaction between atoms, is formed when two atoms share electrons.
- 9. found in plants(mostly fruits and seeds)and animals, most important energy storage form
- 11. different atoms of an element that nave the same number of proton but different number of neutron
- 12. a chemical reaction in which a compound reacts with water, causing decomposition and the production of two or more other compounds
- 13. regulate specific physiclogical processes
- 16. the basic particle of matter, the smallest portion into which an element can be divided and still retain its properties
- 17. negatively charged ion
- 18. a substance consisting of two or more elements in a fixed ratio