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Chemisty Unit Test

Study Cards

TermDefinition
solid to a liquid melting
solid to a gas sublimation
gas to solid sublimation
gas to a liquid condensation
liquid to a solid freezing at 0
Liquid to a gas evaporation at 100
Physical Property characteristic or description of a substance that may help identify it
Chemical Property how a substance reacts or behaves
Density/Mass/Volume formula m v|d
Clarity opaque, transparent, translucent, & opaque
Ductility ability to be pulled into a wire (copper)
combustibility ability of a substance to react with oxygen to produce water, Co2 & energy
matter anything that has mass or takes up space
Mixture Combination of pure substances
Pure Substance made up of only one type of matter
Mechanical Mixture a.k.a heterogeneous - can physically pick out (trail mix)
Solution a.k.a homogeneous - only one part is visible (apple juice)
Compound made up of elements that are chemically combined (Nacl) (N2o)
Element can not be broken down any farther (gold, Au)
Physical Change changes what the substance looks like, but not the chemical make up
Chemical Change changes the chemical make up of the substance and is usually impossible to reverse
Evidence of chemical change 1. Heat or light is given off 2. impossible to reverse 3. Bubbles of gas are formed 4. A new colour appears 5. Solid material turns into a liquid (precipitate)
Electrons are equal to protons
Neutrons = atomic mass-protons
P=E=A protons+electrons=atomic number
Subtonic Particles Protons are in the nucleus - 1Au Neutrons are in the nucleus - 1Au Electrons orbits - O
Corrosion slow chemical change when metal reacts with oxygen from the air which creates oxide
Combustion A substance reacts rapidly with oxygen and releases energy. The energy is observed as heat and light
Fossil Feuls coal, oil, natural gas, gasoline
What makes up combustion? Hydrocarbons
Reactants & Products of combustion hydrocarbons + oxygen = carbon dioxide + water (reactants) (products)
Hydrogen H
Helium He
Lithium Li
Beryllium Be
Boron B
Carbon C
Nitrogen N
Oxygen O
Fluorine F
Neon Ne
Sodium Na
Magnesium Mg
Aluminum Al
Silcon Si
Phosphorus P
Sulfur S
Chlorine Cl
Argon Ar
Potassium K
Calcium Ca
John Dalton's Theory -1808 atoms are solid indestructible spheres does not include the subtonic particles
J.J Thomson's Theory -1897+ believed that atoms are solid spheres that are made up of positive mass with tiny negative particles embedded throughout
Ernest Rutherford's Theory -1914 famous gold leaf ex proves that the nucleus is positive and the electrons are outside proposes that the atom is empty and does not include neutron or energy levels for electrons
Niel Bohr's Theory -1921 explains the role of valance electron bonding orbits around shells electrons in definite energy levels around the nucleus
Chemistry the study of the composition of mater (make up)
3 things that indicate a physical change change of mass, change of state and change of texture
Reaction With Acid When Mg is added to acid, it produces bubble of gas and the metal disappears. When gold is added, there is no visible change
Mystery Gas: Oxygen, Hydrogen, Carbon Dioxide O: put glowing split into the tube, if it ignites then it is O. For H: put flaming stick in if it makes a pop, it is H. For C02: put flaming stick into the tube, if it goes out, there is c02
the particle theory f.m.m.s.s force, moving, matter, space, substance
Created by: seema.lakhii
 

 



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