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2nd 6 weeks Test Q/A
Periodic Table, Changes, & Properties
| Question | Answer |
|---|---|
| What are the 2 most abundant elements in the Earth's Crust? | Oxygen & Silicon |
| What are the 2 most abundant elements in the Atmosphere? | Nitrogen & Oxygen |
| What are the 2 most abundant elements in the Human Body? | Oxygen & Carbon |
| What are the majority of elements on the Periodic Table? 75% of it? | Metals |
| What is a metalloid? | A mixture of properties of a metal & nonmetals |
| What is a chemical change? | A change which the substance is an entirely new one, and occurs with a chemical reaction. |
| What is a physical change? | A change which the substance's appearance changed and it is chemically the same thing. |
| What are the 5 indicators of a chemical change? | -Color Change -Heat is absorbed -Gas produced -Light or Heat produced -Solid participate |
| Is boiling a chemical or physical change? Why? | Physical, because it is a change in state. |
| What elements make up H2O? | Hydrogen & Oxygen |
| How many Elements are in this substance? H9AuW3 | 3 elements |
| Is CO2 an element or compound? | Compound |
Created by:
GuguLara