interesting+facts

POST UP YOUR ANSWERS 1. What is the first element on the periodic table? hydrogen ||
 * TRY THIS CHEMISTRY QUIZ

A nucleus ||
 * 2. What is the centre of an atom called?

True :) ||
 * 3. True or false? Acids have a pH level below 7.

oxygen ||
 * 4. What is the main gas found in the air we breathe?

False electron is negative ||
 * 5. True or false? An electron carries a positive charge.

Chemistry :) ||
 * 6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?

Au ||
 * 7. What is the chemical symbol for gold?

Potasium ||
 * 8. K is the chemical symbol for which element?

Electron ||
 * 9. What orbits the nucleus of an atom?

Mercury ||
 * 10. At room temperature, what is the only metal that is in liquid form?

True ||
 * 11. True or false? A neutron has no net electric charge.

fission ||
 * 12. A nuclear reaction where the nucleus of an atom splits into smaller parts is known as nuclear fission or nuclear fusion?

Water ||
 * 13. What is H 2  0 more commonly known as?

Carbon Dioxide ||
 * 14. What is the third most common gas found in the air we breathe?


 * 15. What is the name given to substances that are initially involved in a chemical reaction? ||

False they have a pH above 7 ||
 * 16. True or false? Bases have a pH level below 7.

Base ||
 * 17. Is sodium hydroxide (NaOH) an acid or base?


 * 18. Atoms of the same chemical element that have different atomic mass are known as? ||

False--didn't we already do this question 5 :) ||
 * 19. True or false? An electron carries a positive charge.

Carbon ||
 * 20. What is the fourth most abundant element in the universe in terms of mass?