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Criado por Becca Westwell
mais de 10 anos atrás
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Questão | Responda |
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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