A)Which of the following is not a property of a noble gas? they do not ionize, t

Question

A)Which of the following is not a property of a noble gas? they do not ionize, they have a filled shell of s and p orbitals, they form diatomic gases, they have eight valence electrons

B)The reaction 2 Al(s) + 3 F2 (g) 2 AlF3 (s) can be classified as a _______ reaction.

C)For a 10 gram sample of each of the following elements, which one would contain the smallest number of atoms? Silicon, chromium, tin, sodium

D)Oxidation-reduction (redox) reactions always involve _______ - formation of water, transfer of electrons, dissolving of a salt, formation of a solid, formation of a gas

E) Which of the following is not a chemical property? copper jewelry turns skin green, gasoline explodes when heated, sugar dissolves in water, iron rusts when exposed to seawater

Explanation / Answer

A. they form diatomic gases

noble gases contains octet electronic configuration. They do not form diatomic molecules.

B)The reaction 2 Al(s) + 3 F2 (g) 2 AlF3 (s) can be classified as a _______ reaction.

combination reaction.

C. no of atoms = weight of substance * 6.023*1023/ gram atomic weight

                        = 10*6.023*1023/28    for silicon

                       = 10*6.023*1023/52 for chromium

                      = 10*6.023*1023 /23   for sodium

                    = 10*6.023*1023/118.71 for Tin smallest no of atoms.

D)Oxidation-reduction (redox) reactions always involve _______ - transfer of electrons.

Oxidation involve lose of electrons. Reduction involve gains of electrons.

E. gasoline explodes when heated

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