help guys pls is urgent!
1. What is the first element on the periodic table? |
2. What is the centre of an atom called? |
3. True or false? Acids have a pH level below 7. |
4. What is the main gas found in the air we breathe? |
5. True or false? An electron carries a positive charge. |
6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field? |