The Lewis structure depicts the number valence electrons surrounding an atom. These are the electrons present in the outer shells which can participate in bonding with another atom or remain as non-bonding (lone pair) electrons.
In the given example there are 7 dots or 7 electrons surrounding a Cl atom. This corresponds to 7 valence electrons with a configuration that can be given as: s²p⁵ and specifically, 2s²2p⁵
The correct answer is C. Because sunlight hits the Earth's surface at a greater angle near the equator.
Solubility is a property referring to the ability for a given substance to dissolve in a solvent
Gasses the most abundant natural occurring gas is nitrogen which makes up 78% of the air.