Chapter 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Energy in action | Kinetic energy
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| Stored energy, that has the potential, or capability to do work but is not doing so | potential energy
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| The form stored in the bonds of chemical substances | Chemical energy
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| This energy results from the movement of charged particles | Electrical energy
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| Energy directly involved in moving matter | Mechanical energy
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| Energy that travels in waves | Radient energy or electromagnatic energy
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| Unique substances that cannot be broken down into simpiler substances by ordinary chemical methods | Elements
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| What 4 elements make up 96% of body weight | carbon, oxygen,hydrogen and nitrogen
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| unique building blocks for each element, gives each element its physical and chemical properties | Atom
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| One or two letter chemical shorthand for each element | Atomic Symbol
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| Atoms are composed of subatomic particles called | Protons, neutrons, and electrons
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| where are protons and neutrons found? | The nucleus
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| Where are electrons found? | Found orbiting the nucleus in and electron cloud
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| What model is useful for predicting chemical behavior in atoms? | Orbital model
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| Number of protons in the nucleus is called? | Atomic Number. (Left side of atomic symbol)
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| Total number of protons and neutrons in the nucleus | Mass number
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| Two or more atoms bonded together is called? | A molecule
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| Two or more different kinds of atoms bonded together is called? | A compound
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| What are the 3 types of mixtures? | Solutions, Colloids, Suspentions
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| Solutions are Homogenous mixtures |
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| Substance found in greatest amount, usually in water, and usually a liquid | Solvent
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| Present in smaller amounts | Solute
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| Colloids AKA (emulsions) are Heterogenous mixtures. Can be liqid or solid | some undergo Sol-gel transformations
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| Suspentions are Heterogenous mixtures |
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| Mixtures have NO chemical bonding, they CAN be seperated by physical means, and they are Hetero or Homogenious |
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| Compounds HAVE chemical bonding between components, they CAN be seperated only by BREAKING bonds, all are HOMOgenious |
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| What are chemical bonds? | Energey rel;ationships between ELECTRONS of reacting atoms
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| What is a Valance shell? | Outermost electron shell
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| What are the 3 types of chemical bonds? | Ionic Bonds, Covalent bonds, and hydrogen bonds
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| Chemical Bond between atoms formed by the transfer of 1 or more electrons from one atom to another | Ionic bond ex. table salt and and sodium chloride (NaCl)
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| chemical bond created electron SHARING between atoms | Covalent bonds
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| How are covalent bonds formed? | By sharing TWo or more valence shell electrons
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| Non polor= shared Equally, straight structure Polor= NO sharing | ex CO2 ex H2O
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| Attractive force between electro+ H of one molecule abd a electro- atom of another molucule | Hydrogen bond
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| When do chemical reactions occur? | When chemical bonds are formed, rearranged, or broken.
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| What is synthesis? | When atoms or molecules combine to form a larger, more complex molecule A+B->AB
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| when does a decomposition reaction occur? | When a molecule is broken down into smaller molecules AB->A+B
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
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