Carbon atoms form ____ (2,3,4) bonds with other atoms by _____ (gaining, losing, sharing) valence electrons in order to attain a
2 answers:
Answer : Carbon atoms form 4 bonds with other atoms by sharing valence electrons in order to attain a stable configuration.
Explanation :
The given element is, Carbon
The element carbon with symbol (C) having the atomic number 6 and the atomic mass 12.
The number of electrons in carbon atom is, 6
The electronic configuration of carbon will be,
The number of valence electrons in carbon atom = 2 + 2 = 4
That means carbon atom have the ability to form four bonds with the other atoms by the sharing of four valence electrons in order to achieve a stable electronic configuration.
For example : Carbon atom share their four valence electrons with four hydrogen atoms that has one valence electron to form a methane molecule, and carbon and hydrogen are bonded by the covalent bond.
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Answer: Option (E) is the correct answer.
Explanation:
A spontaneous reaction is defined as the process which tends to occur on its own. And, a non-spontaneous reaction is defined as a process for the completion of which we have to provide certain conditions.
For example, ice melting at is spontaneous primarily due to the increase in molecular disorder (dispersal of matter). Also, melting of ice is taking place on its own without any external force.
It is not necessary that all exothermic reactions will be exothermic in nature.
Thus, we can conclude that the statement all exothermic reactions are spontaneous, is false.