Examlex
The total number of protons and neutrons of an element establishes its _____ number.
Mate Selection
The process by which individuals choose their partners, influenced by a multitude of factors including biological, cultural, and personal preferences.
Physical Appearance
The way one's body, hair, skin, and overall external looks are observed by others.
Empirical Research
A way of gaining knowledge by means of direct and indirect observation or experience.
Happiness
A state of well-being and contentment characterized by positive emotions ranging from joy to intense pleasure.
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