Examlex
Which of the following is associated with a positive ethnic identity?
Ca
The chemical symbol for calcium, an element with atomic number 20, essential for living organisms, particularly in cell physiology and bone formation.
Neutrons
Electrically neutral subatomic particles found in the nucleus of an atom, contributing to the atom's mass but not its charge.
Isotope
Variants of a particular chemical element which differ in neutron number, and subsequently in mass, but share the same number of protons.
Protons
Subatomic particles found in the nucleus of every atom, possessing a positive electric charge.
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