Mid-term Study guide
These are some of the definitions that are on the test. There is nothing on lab safety, metrics, graphing, atomic structure, bohr model. Hope that this helps you!!!!!
Terms
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- combustion
- Occurs when there is a rapid exothermic combination of substances with oxygen. Fuel+o2+Heat.
- isotopes
- atoms of the same element that have the same number of protons but different numbers of neutrons
- neutrons
- a neutral charged particle found in the nucleus
- Cation
- positively charged particles
- Precipitant
- insoluble solid that forms when the solutions are mixed together
- Hydrogen (H2)
- A colorless gas that will explode in the presence of fire or a spark if oxygen is present
- Acetylene (C2H2)
- a colorless odorless gas that will burn when oxygen is present
- Ions
- charged particles
- ions
- what happens when atoms gain or lose electrons that creates an imbalance of charges due to an uneven number of protons and electrons
- decompostion
- : Occurs when chemical bonds are broken due to heat of light, large compounds will break down into smaller compounds or elements
- what makes hydrogen peroxide decompose?
- light
- Effervescence
- gas which is produced during a chemical reaction. Causes bubbles to be formed
- Chemical reaction
- causes bonds between atoms to form new bonds and new chemicals
- catalyst
- a chemical that changes the rate of reaction by making it go faster. The catalyst does not take part in the reaction and it is still present when the reaction in complete. Provides convenient surface area where they or the reactants collide
- Bases
- Tastes bitter, CO3 and OH donars
- Acids
- hydrogen Ion donars
- endothermic
- Where energy is absorbed. The products temperature is colder than the reactants.
- Factors that can enhance a chemical reaction
- Increase in temp of reactants Increase surface area of reactants Increase of concentration of reactants Adding a catalyst
- Carbon dioxide (Co3)
- a colorless odorless gas that does not aid in combustion. A burning flame will go out
- electrons
- a negatively charged particle that does not move in fixed paths around the nucleus
- displacement
- Occurs when an element of chemical group breaks the bond of another chemical group or element making a product or products
- Oxygen (O2)
- a colorless odorless gas that will make a flame burn brighter and faster. Has the capacity of making a burning ember burst back into flame A gas which is required for combustion
- bonds
- something formed to make atoms more stable
- protons
- a positively charged particle found in the nucleus
- Four indicators of a chemical Reaction
- New chemicals are formed, Change of color/ that is different than reactants, Energy is released or absorbed,Light can be produced
- reactants
- The chemicals that start the chemical reaction
- Products
- what is being produced
- molecules
- a pure substance made of two or more atoms chemically bonded that is the smallest particle of a compound
- isotopes
- the mass when you add the protons and neutrons
- exothermic
- When the chemical reaction releases heat. Products become warmer than reactants.
- compounds
- pure substances that are made of two or more elements chemically combined that can be broken down to simpler substances by heating and electric energy
- Anion
- Negatively charged particles