Question 2 of 10 Which is an example of a scientist using a mathematical model to describe the atom? O A. The scientist uses ping-pong balls to represent protons, neutrons, and electrons. O B. The scientist thinks of the atom as being like a planet and its moons. O C. The scientist has a computer calculate how far the electrons are from the nucleus. D. The scientist draws a picture of an atom, being as accurate as possible

a non redox reaction occurs when there is not a transfer of electrons. for redox reactions, which are reduction-oxidation reactions, a change in the oxidation number occurs. elements that are reduced gain electrons, and elements that are oxidized lose electrons.

explanation:

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.