Flashcards
Chemistry-topic 1
Flashcards do conjunto (6)
- 1What do atoms contain? What’s their charge?Protons +1
Neutron 0
Electron -1
Number of protons is equal to electrons
Nucleus is made up of protons and neutrons
Electrons float around the outside - 2What is an isotope?An isotope are different forms of the same element
Same atomic number
Different mass numbers - 3Atomic number and mass numberAtomic number is the total amount of protons
Mass number is the total of protons and neutrons in the atom - 4Question TextAnswer Text
- 5Distillation method1. The solution is heated. The part of the solution that has the lowest boiling point evaporates first
2. The vapour is then cooled and condenses and collected
3. The rest of the solution is left behind in the flask
You can do simple distillation to change sea water into pure - 6Method of fractional distillation?Fractional distillation separates a mixture of liquids
1.put your mixture in a flask and stick a fractionating column on top.
2. Then you heat it
3. The different liquids in the mixture will have different boiling points
4. Lowest boiling point evaporates first and reaches the top of the column
5. This should condense and and be collected
6. Th temperature is then increased so the second evaporates and condenses and so on
Informações
- Descrição
- Atomic structure and the periodic table
- Criado por
- Lucy Burgess
- Visualizações
- 1
- Avaliação