| Question | Answer | | |
| What is the smallest unit of an element that retains the property of that element? | an atom | | |
| What are made from two or more atoms that are joined together? | a molecule | | |
| What molecule is made of hydrogen and oxygen? | water | | |
| What is the atomic number of an atom? | the number of protons in an atom | | |
| What is the center of an atom called? | the nucleus | | |
| what is inside the nucleus of an atom? | protons | neutrons | |
| What moves around the nucleus of an atom? | electrons | | |
| Protons carry what charge? | positive | | |
| Neutrons carry what charge? | neutral | | |
| Electrons carry what charge? | negative | | |
| What are some properties of metals? | luster | conductivity | flexibility |
| Metals are good conductors of what? | heat | electricity | |
| What is the flow of electrons from one atom to another called? | electricity | | |
| All matter is made of what? | atoms | | |
| How can a scientist separate water into hydrogen and oxygen gas? | by running electricity through it | | |
| How are elements arranged on the periodic table? | by atomic number | | |
| What does the atomic number of an atom represent? | the number of protons in an atom | | |
| What kind of physicist studies the inside of an atom? | nuclear | | |
| What must be aimed at the nucleus to separate the neutrons? | an electron beam | | |
| What parts of the universe are made of either matter or energy? | everything | | |
| What type of atoms are in every living thing? | carbon | | |
| What are the 3 most common forms of matter? | solids | liquids | gases |
| What material cannot be broken down into anything simpler? | an element | | |
