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Quarter 1 Test Prep
Preparation for Quarter 1 Chemistry Test
| Question | Answer |
|---|---|
| What is the unit of temperature most commonly used by scientists? | Celcius |
| The atomic number of an atom equals what? | The number of protons |
| What does the sum of the protons and neutrons of an isotope equal? | The atomic mass number |
| How many protons does Carbon-14 contain? | 6 |
| How does the energy of an electron changes when it goes from energy level 2 to energy level 4? | It increases |
| What does an electron give off when it goes from a higher to a lower energy level? | a photon |
| The principle quantum number indicates what property of an electron? | The energy level |
| What color of light has the highest energy? | Violet |
| What color of light has the lowest energy? | Red |
| If you can determine the exact position of an electron, what are you not able to determine | The speed |
| What are valence electrons? | Electrons in the outermost energy level |
| Do electrons act like particles or like waves? | They act like particles and waves. |
| What is the principle that says you cannot determine both speed and location of an electron at the same time? | Heisenberg uncertainty principle |
| How does the quantum mechanical model describe the positions of electrons? | In terms of probability |
| What happens when an atom drops to a lower energy level? | It loses energy |
| What scientist believed that all atoms of one element were identical? | Dalton |
| What subatomic particle has almost the same mass as a proton? | The neutron |
Created by:
mmetzler
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