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Definations
Fichas del conjunto (35)
- 1Who made periodic tableDimitri Mendeleev
- 2who discovered protonErenest Rutherford
- 3Who made Plum Pudding ModelJ.J Thompson
- 4ElementPure substances made up of atoms of only one type.
- 5ProtonsPositively charged subatomic particle.
- 6Nucleuscentral part of an atom, containing protons and neutrons.
- 7Isotopesatoms with same number of protons but different number of neutrons.
- 8Atomic numbernumber of protons.
- 9Which is the lightest part of an atom.Electron
- 10when an atom becomes a positive ionby loosing and electron
- 11Mixture2 elements or compounds together but not chemically bonded
- 12Ionic BondWhen 2 ions have opposite charge and they attract.
- They are very strong bonds
-usually soluble in water
-conducts electricity when melted or
dissolved
- High boiling and melting points. - 13The covalent Bonda chemical bond that involves sharing a pair of electrons between atoms in a molecule. but not all covalent solid are molecular.
- they have low melting points
-they do not conduct electricity - 14MetalsMetals have high boiling and melting point. they are good conductor of heat and electricity. they are ductile.
- 15Alkali MetalsThey are 6 metals in group 1. They react with water to give an alkali solution.
They are good conductors of electricity and heat. But have low melting point. they are very soft and can be cut rom knife. - 16Group 1 alkali metals.These are most reactive metals. they are very soft due to having one valence electron.
- 17AllotropesDifferent forms of the same element
- 18Empirical formulaA formula that shows the simplest ratio in which atoms combine in a compound.
- 19Electron Configurationelectron configuration is the arrangement of electrons of an atom
- 20Displacement reactionA displacement reaction is a type of reaction where part of one reactant is replaced by another reactant.
- 21Neutralisation reactiona chemical reaction in which an acid and a base interact with the formation of a salt;
- 22Testing carbon dioxide.Put a lit splint in a test tube of carbon Dioxide
(eg Baking Soda+Vinegar )
The flame in the the stick would be extinguished. - 23Signs of chemicals reactions.- Change in color.
- Precipitate is formed.
- Bubbling - 24Molemole= mass/ molar mass.
mole=concentration/volume.
mole= no. particles/ 6.02X10^23 - 25AcidsThey are corrosive and have a PH level lower then 7. They taste sour.
- 26BaseThey are used in cleaning products. they have a PH level of higher than 7.They taste bitter
- 27Reactivity seriesA list of metals ranked in order according to their reactivity.
- 28Noble gasElements in group 8, that have full outer shell so they don't form ions.
- 29QuarksThey are fundamental particles of atoms. They are the building blocks for subatomic particles .
- 30LeptonsSubatomic particles of electrons.
- 31Depositionwhen gases turn to solid
- 32sublimationsolid to gas
- 33Law of constantEvery pure sample of a compound would stay the same in the composition
- 34Percentage CompostionPercentage of how much of each element is present in a compound
- 35How to work out Percentage Composition of a compound eg Glucose (C6H12O6)Mr = 6x12+12x1+6x16
=180
C=72/180 x 100
=40%
H=12/180 x 100
=7%
O=96/180 x 100
=53%
*Note Percentages must all add to 100%
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- Descripción
- 10 Chemistry Fichas sobre Definations, creado por Rohan Bhalla el 04/06/2013.
- Creado por
- Rohan Bhalla
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