--kemia
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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| Exothermic | Reactions, where bonds in the products are stronger than bonds in the reactants-> energy (heat) is given out-> HOT!
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| Endothermic | reactions, where bonds in the reactants are stronger than bonds in the products. Energy (heat) is absorbed from the surroundings,->COLD!
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| Chemical kinetics | Study of the factors affecting the rate of chemical reaction
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| Rate of a chemical reaction | increase in the concentration of one of the products per unit time (dm^3/mol/s)
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| When atom reaches the octet, it achieves.... | ....gas configuration
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| Ionic compound | electrons are transferred from one atom to another to to form ions with complete outer shell
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| Ion | An atom/molecule when its total number of electrons is not the same with protons
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| Isotopes | Same elements, same number of protons, different numbers of neutrons
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| Ionic compound | positive and negative ions are attracted to each other by STRONG ELECTROSTATIC FORCES
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| Cation | positively charged ions
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| Anion | negatively charged ions
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| Ionic compounds have | high melting points
high attraction (requires lot of energy to separate them)
high boiling points
good conductors of electricity
most are soluble with water
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| The overall cahrge of a compound? | Zero
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| Elctronegativity | The a relative measure of an atom's ability to attract electrons to itself
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| Noble gases have reached.. | .. the octet
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| Covalent bonding | sharing of one or more electron pairs so that each atom in the molecule achieves an inert gas configuration (octet)
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| Covalent compounds have | low melting points
low boiling points
can be gas, liquid or solid
poor conductors of electricity
most are not soluble with water
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Created by:
blueberrykh
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