ESQs 2
- Created by: Batek
- Created on: 17-04-22 11:17
Other questions in this quiz
2. What does the top number of each element mean?
- That number - bottom number = Neutrons
- That number - bottom number = Protons
- That number - bottom number = Electrons
3. Describe how to test the gas to show that it is hydrogen.
- Place a lighted splint in a test tube containing the gas. If the gas is hydrogen, there will be a squeaky pop
- Place a lighted splint in a test tube containing the gas. If the gas is hydrogen, there will be a quiet pop
- Place a splint in a test tube containing the gas. If the gas is hydrogen, there will be a squeaky pop
4. Explain why the magnesium has to be heated to start the reaction
- so that the magnesium metal atoms can overcome their activation energy
- so that the magnesium metal ions can overcome their activation energy
- to make fire
5. One mole of a substance is the relative formula mass in
- Grams
- Kilograms
- Pounds
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