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exam science 6.1/6.2

exam science

QuestionAnswer
study the electron dot diagrams for lithium, carbon, fluorine, and neon in the figure. choose the statement that correctly identifies the most stable of the elements. Neon is the most stable element because its highest occupied energy level is filled
The water molocule H2O is polar because it contains two polar single bonds and its molocule has a bent shape
the formation of an ionic bond involves the transfer of electrons
which of the following compounds does not contain molecules. NaCL
In the compound MgCl2 the subscript 2 indicates that there are two chloride ions for each magnesium ion
You see a structural formula in which the symbols for elements are connected by a long dash. You can assume that the chemical bonds in the compound are covalent
Water has a higher boiling point than expected because of the strong attractions between polar water molecules
Which of the following statements correctly describes the substance with the formula KI? There is a one to one ratio of potassium ions to iodide ions
Typically atoms gain or lose electrons to achieve a stable electron configuration
Which of the following formulas represents a compound whose molecules contain a triple bond. N=N
Which of the following groups contain three elements with stable electron configurations helium, xenon, neon
In an electron dot diagram, the symbol, for an element is used to represent the nucleus and all non-valence electrons
When two atoms of the same nonmetal react, they often form a diatomic molecule
because water molocules are polar and carbon dioxide molocules are nonpolar, water has a higher boiling point than carbon dioxide does
Which statement best describes the properties of sodium chloride? Liquid sodium chloride is a good conductor of electric current
Ionization energies tend to Increase from left to right across a period
In a polar covalent bond electrons are not shared equally between atoms
Which of the following is a typical property of an iconic compound tendency to shatter when struck
The formation of an ionic bond involves the transfer of electrons
Which of the following compunds does NOT contain molecules NaCl
Created by: Ellieanah
 

 



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