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Description
Flashcards by Becca Westwell, updated more than 1 year ago
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Created by Becca Westwell
over 11 years ago
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| Question | Answer |
| Atoms | Atoms are too small to see. They have no overall charge. Atoms are made up of shells and they react to fill their outer-shell. They contain protons,neutrons and electrons. |
| Protons | Protons have a positive charge. They are found in the nucleus. |
| Neutrons | Neutrons are neutral. They are found in the nucleus. |
| Electrons | Electrons have a negative charge. They orbit the nucleus. |
| RAM | RAM=Relative Atomic Mass (top number) The number of protons and neutrons added together. |
| RAN | RAN=Relative Atomic Number (bottom number) The number of protons/electrons. The periodic table is arranged in this order. |
| Ionic bond | Between metals and non-metals. The metal always loses the electrons to non-metals. Metals form positive ions and non-metals form negative ions. Opposites attract. |
| Covalent bond | Between non-metals and non-metals. Non-metals share their outermost electrons with other non-metals. |
| The periodic table | The periodic table is an ordered list of all the different types of atoms. |
| A column on the periodic table | Column = Group Elements are in groups with other elements that react in the same way. The group number is the number of electrons in the outer shell. |
| A row on the periodic table | Row = period The period number is how many shells the electron has. |
| Emulsion | An emulsion is when oil and water are dispersed in each other. E.g. mayonnaise, milk, ice-cream, cosmetics, paint. |
| Emulsifier | An emulsifier is what holds an emulsion together. It stops the water and oil spreading out and forming layers. E.g. an egg |
| Hydrophobic | The part of the emulsifier that sticks to oil is hydrophobic. If something is hydrophobic it does not like water. |
| Hydrophilic | The part of an emulsifier that is attracted to water. If something is hydrophilic it likes water. It has a negative charge. |
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