Which of the following hybrid atomic orbitals would you consider most useful for approximating a molecular orbital scheme around the n in nh3?
select one:
a. sp2
b. 2s and 2p
c. sp3
d. sp

c. sp³

Explanation:

:NH₃ has 4 areas around the molecule where electrons are found: 3 bonds and 1 lone pair. In order to minimize electron repulsion, NH₃ will form 4 equal hybridized orbitals that orient themselves in a tetrahedral geometry. There are 1 s valence atomic orbital and 3 p valence atomic orbitals available, so they will all combine to form 4 sp³ orbitals.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.  

c. 4.54 x 10–12 j happens to be correct