| Question | Answer |
|---|---|
| When is a covalent bond formed | A covalent bond is formed when atoms combine to share electrons |
| What is a single covalent bond | A bond that shares one pair of electrons |
| Name two compounds formed by a single covalent bond | Hydrogen molecule and water molecule |
| How many electrons does hydrogen have on its outer shell | One |
| How many electrons does hydrogen need to become stable | One |
| When two hydrogen atoms meet, what happens | They share electrons and a single covalent bond is formed to form a hydrogen molecule |
| How many electrons does oxygen have on its outer shell | Six |
| When two hydrogen atoms meet an oxygen atom what is formed | They share their outer electrons and a single covalent bond is formed to form a water molecule. |
| How many electrons does carbon have on its outer shell | Four |
| When four hydrogen atoms meet a carbon atom, what is formed | Methane molecule (CH4) |
| What is a double covalent bond | A bond that is formed when atoms share two pairs of electrons |
| Name a molecule where a double covalent bond occurs | Oxygen (O2) |
| How many electrons are present on the outer shell of an oxygen atom | 6 |
