Across
- 5. A device used to measure the amount of moisture in the atmosphere is called a _________
- 8. The metal which is yellow in colour and is an alloy of copper and zinc?
- 9. What compound is a common component of air pollution on the ground level, but is essential in the upper atmosphere to protect life on earth?
- 10. The Temperature measured in the Kelvin Scale is called _______ temperature
- 11. an ion consisting of one carbon bonded to three oxygen atoms or a compound containing this ion
Down
- 1. It is a natural process, which converts a refined metal to a more chemically stable form, such as its oxide, hydroxide, or sulphide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment
- 2. What is the common name for calcium sulphate?
- 3. the simplest form of alcohol
- 4. The isotopes of an atom have the same atomic number but different mass numbers, name the isotope of hydrogen that has 2 neutrons?
- 6. It is used to measure the Ph level of a substance?
- 7. covalent bond between atoms in which one atom provides both electrons for the bond?