Different brain regions are activated when we consider ingroup versus outgroup members. for instance, the is activated when we engage in ingroup bias, but is less active when we consider members of outgroups. a. insula b. nucleus accumbens c. amygdala d. medial prefrontal cortex

D. medial prefrontal cortex

The medial prefrontal cortex is the brain region that shows an increased in activation relevant to in-group levels, which is associated with the level of group identification. However, it is less active in out-group members for it dehumanize other group members. This is the role of medial prefrontal cortex in social categorization particularly to in-group versus out-group members.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.