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Periodic table and a
| Question | Answer |
|---|---|
| What rotates around the Nuecleues | Electrons |
| What is in the nueclues | Protons and nuetrons |
| What is a element | A pure substance that can not be broken down that is made of one kind of atom |
| What is a compound | 2 or more elements chemically combined |
| What is the number under a element in a compound | A subscript |
| What does an elements atomic number represent | The amount of protrons |
| How many groups are in the periodic table of element | 18 |
| How many periods are in the periodic table of elements | 7 |
| What are the 4 divisions in the periodic table | Noble gases, metalliods, nonmetals, and metals |
| What does it mean when elements are in the same group | They have the same chemical properties and react in similar ways |
| What does it mean when elements are in the same period | They have the same number of electron shells |
| What is a physical change | When you do something to a substance but it is still the same. Ex painting a wall red |
| What is a chemical change | When you change a substance fully and make it new |
| What does sublimation mean | When a substance goes to solid to gas not liquid |
| What does deposition mean | When a substance goes to gas to solid not liquid |
| What does melting mean | When a solid goes to a liquid with heat applyed |
| What does boiling mean | When a liquid goes to solid with heat applied |
| What does freezing mean | When a liquid goes to a solid with coldness applyed |
| When a substance boils is that a chemical change | No it is physical |
| Is evaporation a physical or chemical change | A physical change |
| Examples of a physical change | Color, size, boiling and melting etc |
| Examples of a chemical change | Rusting, reactivity, burning etc |