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Stephen has a low need for achievement. Generalizing from research, we would predict that Stephen will set goals that are
Zinc-65
A radioactive isotope of zinc with a half-life of 244 days, often used as a tracer in studies of zinc metabolism.
Protons
Positively charged subatomic particles found in the nucleus of an atom, contributing to the atom's mass and defining the element.
Zinc
A chemical element with the symbol Zn and atomic number 30; it is a slightly brittle metal at room temperature and has a variety of uses, from galvanization to dietary supplements.
Isotope
An isotope is a variant of a particular chemical element, which differs in neutron number, while retaining the same number of protons.
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