Examlex
In 1911 Ernest Rutherford performed an experiment known as the "Gold Foil Experiment."
He fired a stream of positively charged alpha particles at a sheet of gold foil which was approximately 1000 atoms thick.Alpha particles have a mass of 4 amu and a charge of +2.
Almost all of the alpha particles passed straight through 1000 atoms of gold.A few particleswere deflected or even bounced back from the foil.Alpha particles are more than 7000 times more massive than electrons.What can you conclude regarding the structure of the atom from these observations?
Androgen Prenatally
Refers to the effects of male sex hormones, such as testosterone, on the development of a fetus prior to birth, affecting physical and possibly behavioral characteristics.
Fraternal Twin
Twins that develop from two different eggs fertilized by two different sperm, resulting in siblings that are genetically distinctive, similar to regular siblings.
Identical Twin
A twin that has developed from a single fertilized egg, dividing into two, and sharing exactly the same genetic material.
Mastery Motivation
An intrinsic drive to achieve competence and mastery over tasks, leading to perseverance and dedication to learning and improvement.
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