.1 (1)
Name the type of chemical bond which forms between one hydrogen atom and
one nitrogen atom,
(2)
2
Define the term valence electrons.
(1)
3.
How many valence electrons does one nitrogen atom have?
4
For the ammonia molecule:
εεε εεε
(2)
6.4.1
Draw the Lewis structure of one ammonia molecule.
6.4.2 How many electron pairs surround the central atom?
6.4.3 How many atoms surround the central atom?
(1)
6.4.4 Give the term that is used to describe the molecular shape.
(1)
Ammonia readily dissolves in water (H20) to form ammonium ions (NH4").
6.5.1 Name the type of bond that forms between one ammonia molecule and
one hydrogen ion.
(1)
6.5.2 Draw the Lewis structure of one ammonium ion.
(2)
[12]​

any one of the statements could be an accurate comparison. but the statement that would define the correct choice and seal the deal is not even on the list:

"the visibilities of vector-x and vector-y in the drawing provided with the question are identical and nonexistent."

scattering of light by tiny particles in air to produce the colors we see on sky, is dependent on the following factors:

(i) wavelength of light

(ii) size of the scattering particle  

(iii) distance traveled by light through the atmosphere.

according to rayleigh's law of scattering, the amount of scattering is inversely proportional to the fourth power of its wavelength. shorter the wavelength, greater is its scattering. hence violet/blue light is scattered more than red.

sun's light is a composite light ( visible light) with wavelengths in the range 400 nm (violet) to 700 nm (red). as sunlight passes through our atmosphere, the molecules of air scatter light according to their wavelengths. during sunrise and sunset, the sun's position is below the horizon. hence light from the sun travels a greater distance in the atmosphere when compared to its position a noon.

as sunlight enters the earth's atmosphere, blue light is scattered away and at the end of its journey in the sky, only red and orange wavelengths remain in the beam.

hence at sunrise and sunset, the sky appears reddish orange.