Chemistry Keywords

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GCSE (Chemistry) Science Fichas sobre Chemistry Keywords, creado por Becca Westwell el 24/04/2014.
Becca Westwell
Fichas por Becca Westwell, actualizado hace más de 1 año
Becca Westwell
Creado por Becca Westwell hace más de 10 años
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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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