level: IMPORTANT
Questions and Answers List
level questions: IMPORTANT
| Question | Answer |
|---|---|
| What is an ion? | Electrically charged particles that form when a atom looses or gains electrons |
| What is a covalent bond? | The attraction of 2 positive nuclei have for a shared pair of electrons |
| What is a ionic bond? | The electrostatic attraction between positive and negative ions |
| What is a metallic bond? | The attraction between positive ions and delocalised electrons |
| How to calculate mass? | number of moles x GFM |
| What does 1 mole equal? | 1g of formula mass |
| How to calculate number of moles? | mass divided by GFM |
| How to calculate GFM? | Mass divided by number of moles |
| How to calculate concentration? | Number of moles divided by volume |
| How to calculate volume? | number of moles divide by concentration |
| How to calculate number of moles using concentration? | concentration x volume |
| What does the concentration of a solution tell you? | Number of moles of solute present in 1 litre of solution |
| How to calculate percentage mass? | total mass of element in the compound ------------------------------------------------ X 100 formula mass of compound |