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--kemia

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