HESI A2 CHEMISTRY WITH 100% CORRECT QUESTIONS AND ANSWERS
The breaking of bonds and the reforming of new bonds to create new chemical compounds with different chemical forumulas and different chemical properties. - ANSWER-Chemical Reaction
syntehesis, decomposition, combusion, single replacement, double replacement - ANSWER-Five main types of chemical reactions.
Two elements combine to form a product. - ANSWER-Syntehsis Reaction
The breaking of a compound into component parts. - ANSWER-Decomposition Reaction
The reaction of a compound or element with oxygen. In the combusiton of a hydrocarbon carbon dioxide and water are produced. - ANSWER-Combustion Reaction
Reaction involoving ionic compounds. The reactivity of the ionic compounds determines whether the reaction will take place or not. Can be single replacement or double replacement reaction. - ANSWER-Replacement Reactions
Reaction between a more active metal reacting with an ionic compound containing a less active metal to produce a new compound ex. copper wire reacting with aqueous silver nitrate. - ANSWER-Single Replacement Reaction
Reaction involving two ionic compounds where the positive ion from one compound combines with the negative ion of the other compound. The result it two new ionic compounds that have switches partners. - ANSWER-Double Replacement Reaction
The number of protons in a given element. - ANSWER-Atomic Number
An average of the masses of each of the iostopes of an element as they occur in mature. (Represents the number of protons and the number of neutrons in an element because electrons essentially have no mass). - ANSWER-Atomic Weight/ Atomic mass number
What group has a +1 charge - ANSWER-IA
What group has a +2 charge - ANSWER-IIA
What group has a +3 charge - ANSWER-IIIA
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