Across
- 4. relating to the nucleus of an atom.
- 8. is a list of ingredients with which something is made.
- 9. a substance that causes slight inflammation or other discomfort to the body.
- 11. having a pH of less than 7.
- 12. easily set on fire
- 14. is a very small piece of matter with a positive electrical charge that is found in the nucleus of all atoms
- 15. a particular kind of matter with uniform properties
- 19. a thing that is composed of two or more separate elements
- 21. having a pH of more than 7.
Down
- 1. father of chemistry in Islamic Civilization
- 2. combines with oxygen and makes things burn,
- 3. element with atomic number 1
- 5. the process of taking something ordinary and turning it into something extraordinary
- 6. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 7. is a very small particle of matter that has a negative charge
- 10. a particle of matter that uniquely defines achemical element
- 13. a place for labor or work
- 16. substances that are poisonous
- 17. tending to cause corrosion.
- 18. a usually round part of most cells that is enclosed in a double membrane, controls the activities of the cell
- 20. electric charge of atom