A high self-esteem means believing in yourself and being confident that you are a valuable person. This is related with a positive mental health, which allows people to enjoy life and live without suffering major stress. This two characteristics have been correlated with a positive ethnic identity in teens whose ethnic heritages differ from the dominant culture. Having a positive ethnic identity means supporting the heritage culture without omitting the practices of the dominant culture.
Together,the number of protons and the number of neutrons determine an elements isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes.
