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Chemisty Unit Test
Study Cards
Term | Definition |
---|---|
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 |